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  1. #76
    Join Date
    Jun 2008
    Location
    Ely, NV
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    4,374

    Default Re: My '78 Skylark (before starting the project)

    You'd have to get new frame mounts for the motor mounts (removing the lower control arms to swap them), a new transmission or an adapter plate for yours, which a new transmission may warrant a new transmission crossmember (maybe?), all new accessory brackets (alternator, power steering, etc), the metal fuel line that runs along the crossmember to the fuel pump on the drivers side of the engine would have to be modified/replaced because Chevy's fuel pumps are on the passengerside. These are what I know off the top of my head.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  2. #77
    Join Date
    Jan 2003
    Location
    Kalama Washington
    Posts
    776

    Default Re: My '78 Skylark (before starting the project)

    why go with a buick 350? it would cost about the same to do a 455, which i happen to have one on my garage if you want it. did you give up the 231 idea? oh, and also i have that washer bottle you wanted, just pm me and i will get it to you.
    Dan Lemyre
    75 skylark stage 2 455 (Bittersweet)
    2002 Trans am Ws6
    http://www.v8buick.com/showthread.php?t=181075

  3. #78
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    im not going with a 455 because i still need someone of gas mileage since i do drive it everyday.
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  4. #79
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    Engine displacement and fuel mileage can be managed. I got 23mpg on the highway regularly with an 8.5:1 compressioned all stock '72 455 with a small .450" lift cam and an overdrive. I'm guessing you "may" get 25mpg with a similarly small cammed 350. I was getting 19mpg on my medium'd cammed 455, and will be interested to find out on my new combo. Your mileage may vary.

    Then when you are making the big bucks or have a second car you can start playing with the 455. My only advice on that is, if you are going to be buying new pistons to rebuild the 455, go with something forged and something with valve relief's.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  5. #80
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    I'm also still thinking about either buying a 231 turbo or just modifying mine for one, just need to find a grand national engine that doesn't cost 2 grand.

    It's just hard to Figure out the best solution on a tight budget.
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  6. #81
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    Think i decided tonight that im going to keep my v6 for now, it gets the job done and i feel like it has enough power for a daily driver. Im just curious if you guys think its worth getting rebuilt? or what parts to get rebuilt/performance upgraded, with a 4bbl carb and intake will it decrease my mpg? trying to stay under 500$ if possible.
    Also, Im going to pull my engine and clean/paint it and clean up everything under the hood so next year i can hopefully open my hood without hiding my face :p
    Thanks for suggestions.


    one more thing, is a MSD ignition worth it just as a addon to a non modified engine? pros/cons?
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  7. #82
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    Alright, im working at the fair and going to be getting a check early october for about 700 bucks, trying to finalize what im going to do. I missed a chance for a 231 turbo on craigslist because im broke until that check. So im on the hunt. I would love a 455 but I will driving 30 miles a day and dont want to break myself in gas, when i drove down and back from vancouver i figured i was getting 13-14MPG so im just trying to beat that. with a 455 or even a 350 for that matter i would also need a new tranny. so my hunt begins. any tips or thoughts are always welcome.

    and Dan, Is it a complete 455?
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  8. #83
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    Your first purchase should be a transmission. You can plan long run or short run on cost. Something cheap like a working 2004r will bolt right up to the V6, no mod's necessary just make sure you get the TV cable adjusted properly. That'll kick your mpg up. My odd fire v6 only got 18'ish with the 2004r. My current firebreathing 455 with OD trans get's 19.5 highway, and a low-compression, regular gas, small cammed 455 I had in there got 18 around town and 23 on the highway.

    The easiest conversion would be a Buick 350 with a 2004r transmission. Get a decent low end torque cam in the 350 and that combo should net you well over 20mpg and probably upwards 25+mpg on the highway. That should get you through college.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  9. #84
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    Would I need. 2004r with the torque converter? Or can I use the converter I have now?
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  10. #85
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    You have to get the torque converter with the transmission. If you plan on rebuilding the transmission prior to installation you may as well just purchase a new torque converter.

    Personally, if you are at a junkyard and can see why a car with a 2004r is in the junkyard (smashed side, etc) and pulling the pan the fluid looks relatively decent (or look and smell the ATF on the dipstick, but less certainty) then I'd try my luck and just install it in your car with a fluid change and pray it works. But I don't mind doing work twice.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  11. #86
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    just looked them up at a local pick and pull, they are only 95 dollars for a automatic transmission, so if it was a messed up one, it isnt like throwing down 900 dollars like i've found on craigslist.
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  12. #87
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    Just read this post

    http://www.v8buick.com/showthread.php?t=222207

    And I'm a little confused, do I have to hook this up? What's the point of "locking" it in 4th? Won't it stay there when it's supposed to be?
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  13. #88
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    You'll either want a TCI kit, or do the pressure switch modification in valve body so it will automatically lock up in 4th as long as 12v is supplied. The modification is pretty easy, just replace a pressure switch in the pan and a small re-wire.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  14. #89
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    http://www.summitracing.com/parts/TCI-376600/?rtype=10

    I found this one, but I also found just the wire relay, would I need the entire kit? Or what would I need for the modification?
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  15. #90
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    Reading the PDF instructions there, I'd get that whole kit.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  16. #91
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    Is there a external wiring kit? I'm trying to find everything I need to get a pricing range and all parts.
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  17. #92
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    Third page of the instructions show it comes with the external wiring part (vacuum switch). Pending how you want final control of the torque converter, you may want to buy a toggle switch, but it isn't really necessary.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  18. #93
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    If I didn't put a switch in it, would it do it automatically? also, I don't understand what the Engine vacuum switch is in figure 5 it's the ground, but do you tap into a certain one?
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  19. #94
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    I think i just got everything confused lol I'm reading over them again and I think I understand.
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  20. #95
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    The vacuum switch will control when the converter locks up by controlling the ground source to the converter lock up. So you would have to run the red wire to a fused positive source (I ran mine to a spot on the fuse block in my old Firebird), and the black ground wire to the vacuum switch, which the other terminal on the vacuum switch would just have to attached to some point on the car for a ground, it's not picky. Then of course a manifold vacuum line to the vacuum switch so it can sense load and disengage the lockup if you push the pedal down enough.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  21. #96
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    Okay, so the Vacuum line I already have running correct? I don't have to splice into anything like that. And where would the vacuum switch be at?
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  22. #97
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    Yeah, the vacuum line going to the TH200 can be rerouted to the Vacuum Switch that comes with the kit.

    Not sure what you mean by "where would the vacuum switch be at?". The switch comes with the kit and you can mount it anywhere you want and just run the vacuum line and wires to it.
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

  23. #98
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    Okay, that's what I thought, I think I'm over engineering it in my head, it's a lot more simple then I thought.
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  24. #99
    Join Date
    May 2010
    Location
    Tacoma WA
    Posts
    228

    Default Re: My '78 Skylark (before starting the project)

    Thank you for everything, if you're ever up in Washington I'll buy you lunch! Should be getting everything next week or so, and still looking for the right 350 to buy
    Aaron

    1978 Buick Skylark 4 door(Whole Earth Brown) 231 v6 even-fire Auto

  25. #100
    Join Date
    Jun 2008
    Location
    Ely, NV
    Posts
    4,374

    Default Re: My '78 Skylark (before starting the project)

    No problem. A 2004r and a Buick 350 is definitely the way to go, particularly for mpg's. That was my original plan for my car years ago and the stars just aligned just right for when I went to buy a Buick 350 I found a complete Buick 455 for $250. Couldn't pass it up =P
    The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 2 & TKO-600 (Drag Week 2011!), '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428, MegaSquirt 1 & C6. '69 Firebird replaced, now building a Pontiac Turbo L6!

    My Skylark thread
    http://www.v8buick.com/showthread.php?t=208168
    My Pontiac OHC Six thread.
    http://www.v8buick.com/showthread.php?t=219250

    I'm just a regular guy that fuel injected an old Buick and Thunderbird.

 

 
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