This forum has been a lifesaver in the past, and I’m hoping I can get some answers again here. I’ve got a 4BT Cummins swapped into a ‘76 Chevy K10. Engine has bigger injectors, the Super HX30W turbo, and is a VE pump btw. I am planning to install a piston-style lift pump to it ASAP. I ordered one directly from Cummins, seemed to be about as cheap as anywhere else...#3936320...about $120. Anyway my question is this.....is this model pump a low pressure lift pump? Any idea on the max PSI this pump puts out? Apparently I don’t want over (12?)PSI or else I’ll blow the seals out the front of my IP. Lastly, if this happens to be the high pressure pump, can I change the spring out to a weaker spring? Where can I get one? Thanks for any help at all!