I bought a HO mechanical pump from Jegs, 15 years ago. It supports my 430hp 360 no problem, with a 3/8 line, and no return.
Not what you asked, I know, but I like the KISS rule.
Very helpful. Reason I did the electric also is I spaced off installing the part for the mechanical pump when i assembled it...oops! Wont happen again. I wasn't going to tear the front back off to out it on either.
