Try more initial timing? Might hit the converter a little harder. Most people running 272 @ .050 are locked out.

Whats the CR 12:1?

Have you verified that the balancer TDC mark is correct and not off a few degrees?

Last edited by GTX MATT; 09/11/22 11:01 AM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street