Quote:

Id start with an LA block,4inch crank, and some RHS head prepped by IMM Engines. I think you'll far surpass your 425hp number for not too much money.



What cam(s) would put you in the 425 range with a decent simple heads (IMM or E-brock).

Sure bigger cams will yield more HP, but looking for mellow and somewhat tame at idle and cruise.