Aftermarket EFI and dual internal pump tanks

[Hunter79764]

Stole this from another post, but according to this, the 87+ selector controls the TBI in tank pumps, you could easily have it trigger a couple of relays to keep the current out of the factory selector but still maintain just the factory switch. 920 - Tan would give a 12v signal to your supplied relay to handle the current to the aftermarket pump in the Left tank, and 921 - gray gives 12v to the Right pump.

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[henrym]

Everytime I've tried it, it gives me trouble. The valves wind up failing an returning fuel to the opposite tank it's pulling from, which overflows that tank. I tell people to install a rear mounted tank from a 87 blazer. The 25 gal fits good for a shortbed an a 31 or even a 40 will work for a longbed. Just got to watch the ground clearance with a 40 on a lowered one.

use the corvette fuel filter/regulator, never had a problem with my set up, using a Fitech