Just for kicks, let's plug in a few numbers and see what we can come up with.
For the 1st combo let's assume that the heads have not been shaved=72cc
Forged shelf pistons are no longer available. So it probably has SP 357P40 cast pistons. The valve reliefs in the L2262F 400 pistons are 6.7cc, and come almost to the edge. So I'll leave the 357P reliefs at 6.6cc. It's possible the engine guy may have found a set of NOS SP L2339F40 forged pistons. My engine guy found a .030 over set for me. But they won't affect the CR.
Most people use the Fel-Pro Gaskets, since the Cometics are so high. 1016's=.039 x 4.3
And we'll figure a .005 deck height. Let's plug in these numbers.
http://www.wallaceracing.com/cr_test2.php
I get 9.32 CR. What do ya'll get ?
But most say 9.5 is the max for pump gas. So, if the heads are indeed 72cc, you can use Cometic .036 x 3.95 gaskets and come up with 9.52 CR. With zero deck you can use .040 x 3.95 gaskets. That should be safe for pump gas, IF you don't set the total timing too high, and IF you don't use a steep ramp cam like the CC XE or Lunati Voodoo series. I Think an 068 grind or the 2801 Summit that was mentioned would be a good choice.
This all really depends on the actual head cc, deck height, etc. There's no way to know without measuring.
