I have a question about the fuel pump to buy. I already bought from Napa, but can return, the fuel pump, the wires, and the fuel pump filter. These are AC Delco parts. All this ran me almost exactly 100 dollars, with the pump being 78 of that. Online from JC Whitney I can buy FUEL SENDING UNITS WITH FUEL PUMP for 78 dollars. So the price of the two is exactly the same. The brand at JC Whitney is Spectra Premium which I have never heard of before. I bought the AC Delco pump because I have heard that is the best. Is replacing the whole fuel sending unit of any worth while I am in there?