Well I got it installed on the firewall to the passenger side of the distributor, and i got the original fuel lines reinstalled and modified to fit the carb and the regulator.
I kept trying to find a way to keep the mechanical pump as a backup for the inevitable failure of this magnificent Chinese electric pump in the tank, but the logistics were too difficult.
I did however keep the electric pump on the frame rail. I tested the tank pump and it pumps right through the rail pump without any issues, and I tested the rail pump to see how well it would draw through the tank pump and it works great. The two work perfectly and will put out enough pressure to keep the carburetor happy.
As for the cutoff, I wired through the oil pressure switch, and instead of buying that Revolution Electronics fuel pump controller 12003 to prime it when you turn on the key, i found out that I can use the original pump priming module, GM calls it a "Hot Fuel Handling Module ", which does not need to go through the ECM. It's just got 3 wires, a ground, a hot from the ignition switch, and the output to the pump which is tied into the same wire coming from the original fuel pump relay. Turn the key on and i get 20 seconds of power to prime the system.
I did a little research on these because I have 2 square body Suburbans, a half ton and a 3/4 ton. The heavier vehicles were outfitted with the longer running module, the light duty ones got a 3 to 4 second module, which i confirmed on mine.
I just got the wire harness back into the truck last night and did some preliminary tests to make sure I got everything wired correctly. I'll take it out today and make sure there's no problem on the road. So far though I'm very happy with it.
One thing that I've noticed since installing the regulator is the AFR is more steady at an idle. The fluctuations are very minimal now.
