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.