Yeah, compared to my stk cast iron C59A heads, they look like they have much less volume. IIRC, with my 0.060” overbore, with stk crank, my CR was somewhere between 7:1 and 7.5.1.
No fancy heads on this one… But I couldn’t ask for a better engine. It just sounds pissed off. 59L Engine Bored .120 over Offenhauser pistons and rings. Clay Smith camshaft. 282 duration. .325" lift. Ford exhaust valves. Oversize intake valves. Zephyr valve springs. Iskenderian lifters. Melling high volume oil pump. Neoprene front seal. All new bearings. New crankshaft and camshaft gears