I am trying to install a 350 motor with TBI from a 1988 chevy 3/4 ton K2500 into a 1986 K2500 that was carburetored, what do I want in the way of an external fuel pump and the PSI I should have? I have all the wiring items but the fuel pump was in the tank and I don't want that I like the external better. thanks

 

I used a Holley 14 pound. I mounted it on the frame near the tank and used a toggle switch to power it. I had a 650 cfm carb. You will get more torque with a carb and high rise intake than the TBI set up.