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  1. #1
    Join Date
    Oct 2008
    Posts
    11

    Smile engine swap 307 to 350 sbc

    new to the forum and new to buicks. i've been building and painting older (60-early 70) cars for about 10yrs. i've just bought a 87 t-type regal and i'm going to build a gn clone, the car originally had a 307 in it, motor and trans are gone and i have a fresh 350 sbc and 350 turbo trans from a mid 70s chevy. my ? is will these bolt up in the regal with the chevy motor mounts and the chevy crossmember for the trans or will i need to get buick mounts and buick crossmember. i know some thing were different in the buick, olds and pontiac g- body compaired to the chevy. thanks for any help


    Bill

  2. #2
    Join Date
    Jun 2007
    Location
    Connecticut
    Posts
    2,427

    Default Re: engine swap 307 to 350 sbc

    I dont know the answer to your question, but

    I put a Chevy 327 into a skylark using an adaptor motor mount from Transdapt. Maybe you could search summit or wherever for your application. If your project needs an adapter mount I will bet they make it.
    Ken G
    www.everyday-performance.com
    on Facebook

    NE GS/GN
    83 Olds Cutlass (w/78 Buick 231 TURBO)
    72 Skylark 350 w/ Nitrous (12.87 @ 104.79 on 100 shot) SOLD
    "My mule dont like people laughin'..."


  3. #3
    Join Date
    Aug 2003
    Location
    Warminster, PA
    Posts
    797

    Default Re: engine swap 307 to 350 sbc

    Bill

    I also had a 87 Buick T-type with a V8 engine. I actually special ordered it brand new in 1986. The 307 is an olds engine and it would be an easier swap if you got a 70-72 olds 350 to install and it should bolt right in. If you really want the chey motor in that buick you'll need to get motor mount stuff from either a pontiac or chevy monti carlo SS which used the chevy motor. FYI the Buick and Oldsmobile use the Olds 307 motor in there cars in those days. Hope this helped out. I to loved my 87 Buick T-type and it is a real rare car because not many made.

    George

    Quote Originally Posted by motoman883 View Post
    new to the forum and new to buicks. i've been building and painting older (60-early 70) cars for about 10yrs. i've just bought a 87 t-type regal and i'm going to build a gn clone, the car originally had a 307 in it, motor and trans are gone and i have a fresh 350 sbc and 350 turbo trans from a mid 70s chevy. my ? is will these bolt up in the regal with the chevy motor mounts and the chevy crossmember for the trans or will i need to get buick mounts and buick crossmember. i know some thing were different in the buick, olds and pontiac g- body compaired to the chevy. thanks for any help


    Bill

  4. #4

    Default Re: engine swap 307 to 350 sbc

    you will need sbc mounts crossmembers are same on gbodys depending on trans
    2004r crossmember can be used for 350 trans but you will only have 3 bolts in crossmeber to frame
    Andy bridgeview,il
    65 special v6 daily driver-this needs to go faster
    82 gn clone 455 12.50's on pump, soon trishield 464
    84 gn
    72 skylark convert#2 ,N-25 for sale

  5. #5
    Join Date
    Oct 2008
    Posts
    11

    Default Re: engine swap 307 to 350 sbc

    thanks for the info very helpfull hopefully i can return the favor.

  6. #6
    Join Date
    Apr 2007
    Location
    bennettsville, sc
    Posts
    1,018

    Default Re: engine swap 307 to 350 sbc

    Lots of the 4door 78 to 84 A and G body cars used the chevy 305 and 350 engines. 78 to 81 cars used 350 trans. Good source for frame mounts and trans crossmembers. At least fuel lines are on passenger side on Olds 307 cars, that makes one easy change item.
    71 skylark convertible
    71 gs 455 convertible; auto with a/c; 05d build
    72 skylark coupe: GS455 vert's baby brother:soon to grow up
    84 t-type with 86 gn powertrain
    86 t-type WH1 AQ9 seats
    86 t-type black paint, grey BENCH seat (A65), Tilt.. BARE OPTIONS
    87 turbo limited (original owner/ GMODC car)
    89 firebird SR71 blackbird: 4.1 turbo/200-4r
    00 S10 parts getter/ junkyard dog

  7. #7
    Join Date
    Oct 2003
    Posts
    124

    Default Re: engine swap 307 to 350 sbc

    If you REAllY are interested in a sbc in a Buick, why use an old engine and transmission? Sell it to someone who is into mid-70's Chevys. Then do it right, put a EFI sbc and 200r4 trans. in the Regal. Note: The rear axle ratio could be 3.21, as I think that is what was use behind the 307. You could also put a Buick V8 in the Regal. Just because you an older sbc and trans., it may not be the best choice.

    Diver

  8. #8
    Join Date
    Oct 2008
    Posts
    11

    Default Re: engine swap 307 to 350 sbc

    If you REAllY are interested in a sbc in a Buick, why use an old engine and transmission? Sell it to someone who is into mid-70's Chevys. Then do it right, put a EFI sbc and 200r4 trans. in the Regal. Note: The rear axle ratio could be 3.21, as I think that is what was use behind the 307. You could also put a Buick V8 in the Regal. Just because you an older sbc and trans., it may not be the best choice.

    Diver


    motor and trans are already built and ready to drop, i thought about a buick set up but motor and trans have been sitting for 9 months, was going in a 71 camaro but got body and paint and interior done and got an offer i couldn't refuse$$$$$$. dont want it to sit for to long.

  9. #9
    Join Date
    Jun 2005
    Location
    hazard,ky
    Posts
    4,861

    Default Re: engine swap 307 to 350 sbc

    id use the engine but sell that th350

    sorry od or nothing for me
    66 skylark 2 dr hartop...... in progression
    83 lesabre 4 door waiting on its 350 buick
    04 sivlerado ccsb 4x4 2500 hd d max white
    12 kia sorento sx
    99 f150
    89 dodge spirit
    http://smg.photobucket.com/albums/v237/nekkidhillbilly/

  10. #10
    Join Date
    Dec 2003
    Posts
    2,611

    Default Re: engine swap 307 to 350 sbc

    I installed a 350 sbc & th350 in a 86 4 door Bonneville (g-body) that was org. a Buick 3.8 and metric trans. I used the frame/motor mounts out of a 79 impala. Used the same crosmember and driveshaft.
    Best Sleeper I ever had besides the woody wagon I have now. The 350 had well over 400hp.
    Ray

 

 

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