1997 Chevy Blazer 2-dr fuel line repair questions.

I was wondering if anyone has a fuel line diagram for a 1997 2-door Chevy Blazer with the 4.3L. I recently did a fuel pump and sending unit and I caused a small leak in the return metal line right after the plastic quick connect with the nylon line coming from the sending unit. Is it hard to replace fuel lines? I am thinking i need to cut the nylon line that comes from the sending unit and use a nylon to steel compression fitting to connect a new steel line. I know the plastic quick connect will probably leak after i pull it off the badly rusted line. I was wondering if anyone has any suggestions for me. The delivery and retun line are both pretty rusted. Does anyone know what the sizes of these lines are and what lengths do they sell them in? The delivery line looks thicker than the return line. Thanks!