Hey guys, I am running an '83 F350, 460, with carburetor and mechanical fuel pump. Recently the fuel pump went out and I replaced it with a new one from O'Reilly's. Well the pump cannot keep up with the fuel consumption on the highway - not even without a load. So I am assuming I got a fuel pump designed for a 429 or something... Now I am planning to order one from Summit. Can anyone tell me the correct PSI and GPH for a stock 460? I want to be sure I get the right one this time.