i have i 1974 400 with a 2bbl that im switching to tpi i have just about everything except the fuel line or pump. ive read the chevythunder.com pages about pump psi requirement and im still wondering about some things. i need at least 45 psi and three lines going into my tank a supply, return, vapor right. well my stock 74 tank has 3 lines right now is this unheard of? according to chevythunder supply needs to be 3/8 and return needs to be 5/16 right now the supply line is 3/8 and the return is 1/4 and the vapor is 5/16 can i switch the return and vapor? and last i feel like fabricating a in-tank is going to be too easy to be true it seems like all i have to do is cut the supply line inside, rubber tube and hose tie it to the pump and hook up a few wires and drill a hole for them?


also wat size injectors should i use my motor gets 150 hp and a whoping of torque stock with the 2bbl but its a 400 pushing a fullsize caprice?

 

More to the fuel pump that that. Check out www.nastyz28.com for several EFI setups in second gen Camaros. Those guys can answer about any question there is on your car and setup.