replacing 305 in 1989 camaro with a 350 for older cars with carb (doing away with all that emission crap) wondring if I can keep factory fuel pump in the tank? I am changing the ingniation to vacum advance so that will be ok, please help any advise on this will help!

 

Yeah, I'd try it and see. I expect it will work.

 

If the 305 was fuel injected, the fuel pressure from the in tank pump will be too high for the carburator to handle. You can still use the pump, but you will need a pressure regulator that will drop the pressure down somewhere between 6 & 10 PSI