Stock 72 318 power gains

From the linked article:

Purchase a set of cast or -- preferably -- silicon-alloy hypereutectic pistons designed to deliver a 9.5-to-1 compression ratio with a 72 cc combustion chamber.

Click to expand...

That’s gonna be a tuff.......

Flat tops with no valve reliefs, at zero deck, with the Mr.G .028” head gasket, and 72cc heads....... you get 9.23:1.

I guess you’ll need some domes.........for 300hp.