I painted it with POR 15 under the straps as these are known to collect moisture and rust. There is no guessing if it’s a remanufactured part. The Holley 12-914 is a high quality part. The fuel return line and the vent line on the sending unit also will need to be changed – see the forum for an in-depth discussion on the sending unit. I used the Holley 12-914 fuel pump, which is a 255lph style pump, but others can be used (such as part # F20000169 found on ). The sending unit is also a stock application, however, the fuel pump will need to be changed out to keep up with the fuel supply demand.
The G-body already has a factory fuel tank that is set up for fuel injection (Turbo Monte Carlo tanks and Buick Grand National / T-type tanks). Since I am using the car style intake and the corvette style filter/regulator, this return line runs only from the filter back to the tank. There is a return line required and depending on which style intake determines the length of the return line. This style filter/regulator will also require adapters for the GM style quick disconnect ends to convert over to AN6 ends (my choice for adapters were Russell 644123, 644113, & 640940). The easiest way, and perhaps the cheapest is to use a C5 corvette filter/regulator (part # WIX 33737 available at NAPA, O’Reily’s, or even ). There is a need for some type of pressure regulation to make the constant 58 PSI possible. The fuel line shown in the photos was hand formed using stainless steel seemless tubing (purchased locally from Old Dog Street Rods) and stainless steel AN6 fittings (37 degree flare parts purchased from McMaster Carr). The LS engine requires a fuel pressure of 58 PSI and most fuel supply lines are an AN6 size. seen here is the flexible fuel line that runs behind the engine and is attached to the corvette fuel rail while using the truck style coil bracket and coils. Some customizing is required with the fuel lines, but still a very straight forward project with the proper tooling. The G-body almost lends itself to the fuel system retrofit with all of the current parts available. The fuel system is one such obstacle that can be nearly a bolt-on project now. The GM G-body LS swap presents some unique obstacles that are becoming easier to circumvent.
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