I run the Hemi 120gph pump 8.5 psi max with no regulator on a six pack and it works great. Pulls hard through all the gears. At the worst you would need to add a regulator, if i did that I would set it at 7.5 psi, as far as the 120 gph the engine won't use more fuel than it needs but it certainly will run bad if it doesn't get enough.

I used some of the other Carter pumps and my engine layed over in 3rd and 4th gear and ran like crap, didn't pull the way it should have. The other pumps discussed are prob fine for stock rebuilds, any modifications and I would use the Hemi pump. Just my