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I am currently swapping motors. My car has two fuel lines on the fuel pump.I am assuming one is supply and one is a return. My question is the pump on the new block only has one line in. Should I buy a new one with a return or block the return. It is feeding a holley 650 with vacuum secondaries.
This subject has be discussed in detail somewhat recently . . .
The Search option can give you a Ton of info whether your a new C3 owner or a life long Vette owner.
That being said . . . The decision is up to you as to "how to" or "need to" set up your fuel system for your application. Here are a couple links on the subject by people who seem to be more know knowledgeable than I on this subject. GL