Ok,
1) 1.1hp per cube isn't exactly hard, let alone rocket science.
2) MP sold a crate motor which one of the generic car magazines tested, and found it made 400+ hp, with cast iron heads.
http://www.popularhotrodding.com/en...667em_mopar_318_engine/induction_systems.html
Popular Hot Rodding made 400hp with a mild cam and smog 360 heads....
on a 318.
Maybe you want to check your combo for missing Hp.
