Big heads with big valves on top of low compression with small cubes?
A stock 400 with 75cc heads and .040 gaskets works out to 8.4:1cr(8.8:1 with a .020 steel shim gasket).
Doesn’t sound like a winning formula to me....... but it’s not my money.
It’ll require more gear and more stall, and be less forgiving on cam selection.
