I in the middle of putting vortecs 906 castings on my 5.7 block 3970010 with factory flat tops 4 valve reliefs. Original heads were 462624 with 76cc chambers and 76 cc chambers that were cracked. Im worried about compression being a little to high with the vortecs 62 cc chambers to run 87 octane. Pistons are .025 in the hole the victor gaskets I got are .040 thick is .065 quench to much? My cam is 420/443 valve lift 204/214 duration and 107/117lobe seperation. Will this combo work also what should timing be set at? Thanks Flip