Yea, that really says something about the advances in technology, when you can take a $600 junkyard engine and spend only a couple of hours cleaning the ports up and being able to flow comparative to a top of the ladder fully ported performance/race head that probably cost 4 or 5 times what the whole 4200 engine cost.
Well, I am only saying that way my cylinder head flows now,as it is just a mild street port job. It flows 320 CFM,that is @ .600" lift as the 4 valve head flows 310 or so @ .500"?
Mike K's has his race port head to flow 400 CFM,not sure if the 4200 head will flow that much?
But remember,it's not only all about flow numbers.
MBHD
