500 vs 512 from 400ci

My current setup sees 7300 every time I take the car out. I miss this a lot. This winter is killing me. They promised global warming and I’m freezing my *** off ;-)
Lol, that **** is funny & exactly true. Do you run a max wedge port head?
My 470 saw 7000 rpm on the Dyno by accident and about **** myself