Looking at a 454 engine from a 1990-94 chevy dually. I've read around about V5 and V4 engine blocks? What kind would this one be. In my mind I'm looking at running factory heads and a mutha thumper cam I'm not a racer so it just needs to hit a rough lick and spin a tire. I've figured everthing else out, motor mounts, heater core, etc.. But this block thing kind-a worries me. Engine runs good just looking at cleaning it up adding a cam, intake (Eddy RPM),headers (cheapest that fit) and carb (750). Need some info before I get to deep in this deal.