Heads, which ones when....

MOPAROFFICIAL said
I still have a few things to do before my final opinion on these basic as cast speed Masters that I picked up.

I'm trying to make them something that is a "buff and go" that does 260-270CFM.

That’s a walk in the park with a nice valve job, a little width on the throat and pinch, and remove the Speedmaster ski jump leading into the shortturn valve job.