A 482 Building Block

Discussion in 'Street/strip 400/430/455' started by 6455spd, Feb 23, 2021.

  1. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    That's a nice cam. You probably don't need as big a split with Stage2 heads. With 10.5:1 SCR, DCR should be around 7.8.
  2. Jim Weise

    Jim Weise 1000+HP

    He does have a custom cam coming, similar to the 288-94H, but tweaked for that combo. Comp is grinding it now.

  3. BrianTrick

    BrianTrick Brian Trick

  4. 6455spd

    6455spd Silver Level contributor

    Got my second block measured, looks much better but not great.
  5. 6455spd

    6455spd Silver Level contributor


    Attached Files:

  6. 6455spd

    6455spd Silver Level contributor

    The ribbing between 5 & 7 looks like a good place for a crack to start. Yikes
  7. Bens99gtp

    Bens99gtp Well-Known Member

    I would guess that could be welded to be sure
  8. 6455spd

    6455spd Silver Level contributor

    Is this type of casting flash a common issue to weld up?
  9. Jim Weise

    Jim Weise 1000+HP

    No, not really, but that is not the worry on that block.. the backside of number 6 at just over .100 thick is..

    That block would be fine for a stockish/mild build, with minimal overbore........ we talked on another thread about pistons at .008 oversize the other day, and you looking at a block that would want that 4.320 bore size. Assuming it has near perfect cylinder walls in it, with no pitting or damage.
  10. BrianTrick

    BrianTrick Brian Trick

    While we are talking about flaws and cracks,have you guys ever seen a crack at the top of the front cam bore? This was NOT a race engine,just a core block.

    Attached Files:

  11. 6455spd

    6455spd Silver Level contributor

    I never broke a block but i hear the lifter valley is a potential weak place. That sucks.:(

    My third block is a charm. I am lucky to live close enough to JW and he sourced me a 75 blue block. -Thanks Jim.
    Numbers look fantastic! It is interesting to study the quality upgrades in the blue block castings, cylinders and lifters bores look beefier and more centered. I have some mods to do before I send it off to the machine shop for a 4.320 bore.

    75 block.jpg

    Game back on:)
    1969RIVI likes this.
  12. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Good stuff!

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