Better heads

MOPEkidD-3 said

I dunno.... Aren't those still a bit big for a street 318? I think to really get the most potential out of those heads you'd have to do a bottom-end rebuild with flat-top zero-deck pistons for compression/quench and beefy enough rods, etc. to handle 6500+ RPM.

Click to expand...

Fishy's response is very good and on target. While I would prefur a smaller port, the Magnum port isn't to large to have adverse effects on a large degree.

Your idea of rebuilding the 318, as above, would have great bennifits with any head used, but it would be just a bit better with a closed chambered head and the quench it would have.