i have an 87 z28 that had a 305 in it and someone changed it out to 350 from a chevy impala. the wiring harness was bad on it so i ripped it out made it old skool so now i have 4bbl edelbrock with an HEI vaccum advanced on it.so i have gotten on in time have idle all set. i go down the road and there is no power to it. so need to figure this out not sure what else it could be.

 

fuel pump, fuel filter, bad coil

 

I have new filter on it brand new coil I put a fuel pressure regulator on it from summit racing. There is fuel pressure there I have it set on 5 psi.

 

Thanks to who all tryed to help I figured it out what the problem was it was cat it clogged
From heads being the gas melted the pourclin in side so it runs now