Torque specs

Discussion in 'Street/strip 400/430/455' started by '72 Skylark Custom 4bbl, Nov 9, 2019.

  1. '72 Skylark Custom 4bbl

    '72 Skylark Custom 4bbl Well-Known Member

    Hey everyone.

    Well after a ball busting day I got the 455 into my '72 Lark.

    I saw in my service manual torque specs for the motor mounts to the block, however I didn't see any for the bolt through the frame pad or the frame pad to frame bolts. Is there a torque spec for these or do I just tighten the heck out of them?


  2. Stevem

    Stevem Well-Known Member

    With a common grade 5 plain steel bolt like that which has a 9/16 head 30 is plenty.
  3. Bens99gtp

    Bens99gtp Well-Known Member

    We never torqued ours, I did get grade 8 bolts instead, but just reasonable tight, if i had to guess mine are never more than 40-45.....,never have had an issue with them
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    You don’t need a torque wrench for every bolt in a car, just a bit of common sense.:):)
    1973gs likes this.
  5. '72 Skylark Custom 4bbl

    '72 Skylark Custom 4bbl Well-Known Member

    Thanks guys.

    Honestly I never even owned a torque wrench until I put my heads back on:). Just went to what I felt “felt” right.


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