1973 heads and Intake on a 1970-71 Block

Discussion in 'Street/strip 400/430/455' started by labdad, Apr 20, 2021.

  1. labdad

    labdad Member

    Okay, I have a 1970-1971 1231738 casting block currently at .038” over, and a set of 1973 heads. Shop says it needs to go a bit more than .040 to get the bores trued. I can get the .050” pistons from TA and I have the TA 1633 rods already. Here’s the question: after looking at Team Buick’s site, can my 1973 heads go on the earlier block if I tap and plug the core hole in the head that is left exposed, throw a gasket on on go? Would really like to stick with the heads I have for this daily driver Riviera.
     
  2. LARRY70GS

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

  3. labdad

    labdad Member

    Thank you, yes, it has.
     

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