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Re: planning out dual tank fuel system for LS swap
I just did dual tanks with 5.3 swap. I have 87' TBI tanks (EFI tanks) with the stock 87' sender, and a EP381 Delco fuel pump which fits right into the spot where the stock 87' pump would fit, but it puts out the needed high psi the LS needs. I have a stock 5.3 fuel regulator on the fuel rail, so I have both the pressure and return lines running to the engine.
I have a new switching valve which is rated for mid-60s psi and it plugs into the stock 87 wiring harness. I replaced all the lines with gates EFI rubber hose from the tanks to the switch valve, and then AN line from the switch to the engine.
Lastly I moved the switching valve to the driver side so the lines can run down the driver side of the frame and up to the fuel rail which is on the driver side of my engine. That's not required but its what I did
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