Well, Here's what's happening with my 440...
Starts and runs fine up to, right at 4000 rpm's. No matter if i'm half throttle or wide open, when it hits 4k, it starts spitting, sputtering, backfiring, and losses power. That sucks.
I have a new Edelbrock 750cfm carb, fairly new plugs, 8.8 wires...