4 speed stuff

Discussion in 'Parts wanted' started by 1967 Big Buick, Jun 8, 2018.

  1. 1967 Big Buick

    1967 Big Buick One day at a time.

    I got a customer inquiring about parts to convert his 1972 skylark 455 automatic to 4 speed. Tell me whatcha got.

    He was giving a tranny casing loaded but nothing else.

    bellhousing, pedals, linkages and shifter.
    Last edited: Jun 8, 2018
  2. cstanley-gs

    cstanley-gs Silver Mist

    Bellhousing, linkages and shifter are available as new repros if you cant find original stuff.

    The 4 speed pedals are specific to a manual, but the mounts are the same for auto.
    I found that out, I bought a set of used 4 speed pedals, and saw that the mount in the car was the same, it was just a longer bolt though the brake and out the side for the clutch pedal.

    You may want a clutch safety switch so the car can only be started when the clutch is depressed. Pontiac used the same ones and are available repros.

    There's also the reverse lock out linkage, that turns the column like a floor shift automatic. When in reverse the linkage goes up the firewall to the column. turns the collar on the column and locks the key. You can only get the key out when in reverse. This linkage is the same on an automatic car, I was able to reuse it in my swap.
    This same linkage also activates the reverse lights. the switch goes where the neutral start switch woudl go on an auto. Except this switch sole purpose is to light the reverse lights when the column is turned by the lock out linkage.
  3. rp455

    rp455 Well-Known Member

    1967 Big Buick likes this.
  4. 1967 Big Buick

    1967 Big Buick One day at a time.

    72 skylark
  5. flynbuick

    flynbuick Super Moderator Staff Member

    Ball studs need to installed for the z bar unless you are going with a hydraulic set up.
    1967 Big Buick likes this.
  6. Buickcub

    Buickcub Well-Known Member

  7. Kennybill

    Kennybill Well-Known Member

    Crankshaft needs to be machined for a pilot bearing.
    Nailhead Ronnie likes this.
  8. 1967 Big Buick

    1967 Big Buick One day at a time.

  9. gsfred

    gsfred Founders Club Member

    Should have some of the parts if he decides to go that way.
    1967 Big Buick likes this.
  10. flynbuick

    flynbuick Super Moderator Staff Member

    We generally figure the parts alone, with just a Muncie, will be 3-4K.
    1967 Big Buick likes this.
  11. BrianTrick

    BrianTrick Brian Trick

    Is he looking for 100% concours,like the way it would have came from the factory? If so yes,in the $4k+ range for a complete conversion with everything rebuilt or restored.
    1967 Big Buick likes this.
  12. ilikebmx999

    ilikebmx999 Well-Known Member

    Chances are it already is. In fact I don’t think I’ve come across one that wasn’t.
  13. 87GN_70GS

    87GN_70GS Well-Known Member

    I have a good used 1970 M21 Muncie. Worked fine when I pulled it out 10 years ago
  14. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    I've got a bellhousing and a clutch fork kicking around
  15. 87GN_70GS

    87GN_70GS Well-Known Member

    Careful. Some are fully machined. Most are partially machined. I ran into this looking for a suitable one in my pile of parts. Early cranks almost always are. Later ones (unless it is a factory 4-speed) are not finished. They have a step about half-way down, that is about 30 thou too small. My machinst chose to mill down my bushing to fit rather than open up the crank pilot.
  16. gsgnnut

    gsgnnut Well-Known Member

    Yep- I have a 430 that I converted to a 4 speed and the crank wasn't finished milled. I mic'ed the crank pilot and had a pilot bushing milled to fit the crank. I also learned that if you don't want a galled input shaft use a magnet on the pilot bushing to check that its a proper non ferrous alloy. I have a pile of cheapo ferric alloy bushings that love to heat up and eat up input shafts.
  17. 1967 Big Buick

    1967 Big Buick One day at a time.

    Thanks guys. He was a bit shocked as to what was all needed so he said he can't afford all of it at once.

    If you guys that are offering parts could pm me prices and list of wht you have I'll forward info to him.

    Thanks again, much appreciated.
    Marv Marksberry likes this.
  18. Buickcub

    Buickcub Well-Known Member

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