just letting anyone know who runs stock fuel pumps, I put a new, stock fuel pump on the old 454 79 z28. Part number AMF 0068. Works great but noticed the car smelling like raw gas and had erratic idle. Plugs were wet too. Tried tweaking the carb, checked the timing etc. No help. Then checked the fuel pressure. It was right at 10 psi. Shocked. Put a new ac delco 40727 pump on. Same exact situation. 9-10 psi. Holley 4779 750 dp didn't like that at all. Put a regulator on it and got it down to 6 psi. Much better and car runs great now. Really surprised that a stock pump put out that much pressure. That's just not acceptable.