That is correct, more or less, Hank!
I would have my 250 head done wwith larger valves, full port and lumps. Prolly with roller rockers.
7psi on a stock engine is that much fun?
I have a three stud exhaust manifold for a 250... is that the 292 2.5" manifold? I've not measured it. If it is, I will be installing that as well.
