Competent 451 engine builder in Portland Or

470 with 240 head? I read in this thread you needed 270's at anything above 451. :rolleyes:
Honestly, if you're aiming to make power easier then yes, there's plenty to be made with a 240.
I just ported mine just shy of a 270 because my engine was running out of steam 5800 was peak power on my particular build.