compression or flow?

Just kicking around some figures. The open chamber part of the W-2 head is roughly .050 deep on all 8 chambers. if I cut the heads.050 and the intake side the correct amount I can use a .035 head gasket and have .040 quench on the 360 and 10.61 compression ratio

Same senerio on the 340, but with a .060 thick gasket. .040 quench and 10.73 compression.

That should help with a nice cam to bleed of some compression for pump gas.

If you take the quench down it will kill power. BTDT.

I know it’s a PITA but you are better off decking whatever you need to get to .040 piston to head clearance from the block.

That area is around .100ish from the factory, maybe a bit more. That means you‘ll have taken at least .100 off the heads and head gasket sealing will become problematic.