GM TBI on my 1970 360 duster

Oklacarcollecto said

I kept passing these up because of what looks like a return line.

Another picture.

Click to expand...

I bought one that looks just like oklacarcollecto for my Dart. It was ~$60 from 1A Auto about 6 mo.s ago via ebay. I have seen for ~$45. since. The outlet measures 3/8" OD and return 1/4" OD. Return is probably for emissions, but should work. Projection specs <4 psi return drop. On my 65 Newport, I drilled my sender and installed a fitting and O-ring as MadScientistMike suggests. No need to molest your tank and much safer.

Don't focus on fuel pump pressures. They are positive displacement pumps. Max pressure is where you motor stalls. The external Ford type ca 1990's works for either throttle body (~20 psi) or EFI (~60 psi). Many manufacturers, similar look. I got a new one off ebay for ~$25 recently. Listed for V8 Mustang. Auto Parts usually sell for ~$80 w/ lifetime warranty. You need a 3/8" line to the pump inlet, then 5/16" is OK for most, maybe not for >500 Hp. Projection says to mount near the tank, but I moved to the engine bay so easier to replace on the road (carry a spare), and no issues. You'll know if it cavitates. Even when running fine it makes noise so mount w/ rubber isolators if a driver car.