New Magnum heads for 347 with Flow data

Ok, thats ok if your experience leads you to this conclusion. Just offering advice from evey head ive done from 240z inlines, toyota TC, slant six, sb/bb mopar, sb ford and bb chevy etc...has always help to leave it rough. smooth and glassy is for a BIG *** port with no speed issues and or and BIG rpms.

I appreciate that. I normally leave them as carbided. This time it helped the air stay attached a little longer. J.Rob