1. 

   KELLY SONNABEND Well-Known Member

   as for compression,what is different between 70 and 72 455's? is it the heads? is it the pistons? or both? if you put 70 heads on a 72 block how close would the compression be to the 70 specs?

    

   KELLY SONNABEND, Feb 20, 2004

   #1
2. 

   GStage1 Always looking for parts!

   Compression change was accomplished by bigger dish in pistons. See the site below for head comparisons and pistons.

    

   GStage1, Feb 20, 2004

   #2

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