The bypass spring in the pump determines how much oil goes into the pump and block, not the internal size of the oil pick up
Have to disagree, the suction side of the system is the critical limiting factor. Even with the bypass fully closed, if you can't get it to the pump the volume output will suffer.
Plus Mopar didn’t use 1/2 for no reason. The outer limit of a 3/8 might be beyond nascar needs, which wouldn’t apply to many doing this, but they did it nonetheless.
