EFI-in tank pump conversion

[G_Edmonds]

I can’t imagine how this could be done in car. You’ll need enough clearance to remove the old unit, and fit the whole new unit (which is basically the depth of your fuel tank) under the trunk floor. That is, unless you have a trap door in the trunk.

[Grubby]

I discussed the Holley Sniper type in-tank fuel pump with Peter for a 427 build. He noted you would certainly need to modify the tank in a 289 because there is virtually no clearance between the top of the tank and the body. The clearance to the trunk floor in the 427 was a lesser issue.

I concluded you could have a recess welded into the top of the tank to install the Holley fuel pump and thus get the needed clearance. It needs roughly 1.25" inches (if mounted on a flat surface it sticks up that much). It should be an easy job for a good welder.

Most late model cars no longer use return lines and Holley offers several in-tank units that are near OEM quality and don't need it.

John

[spdbrake]

I think if I got another EFI setup I'd use an Aeromotive variable speed control pump. (uses feedback to slow down at cruise and idle). Keeps the fuel cooler and the pumps last longer. Plus you can ditch the current low pressure electric pump if you have one.
This is the smallest of the units.
https://aeromotiveinc.com/product/br...ed-controller/
https://aeromotiveinc.com/product/sy...l-efi-3-5-gpm/

The return line can be tapped in the filler neck with one of these Moroso kits.
https://www.summitracing.com/parts/mor-65385

Holley has started offering variable speed feedback pumps as well.