just had an engine built for my 72 pre L. 427 stroker with right at 600 hp 580 ft lbs. was wondering about the fuel pump. don't know if i want to go with an electric fuel pump or not simply because i've never fooled with one. seems kind of a hassel with the regulator, mounting it etc. found a killer holley manual fuel pump at summit racing. ffr of 170 gph @ 7.5 psi. i guess my question is will this manual pump do the job......almost forgot, the carb is a demon 750 king. hope this is enough info.