i doubt that you really need a holley black pump,i have a blue on my 13.1 340 and its never ran out of fuel on the motor and im sure the 750 mite be over board to....but thats just my two cents
a slant racer back east just picked up over a tenth and a half and besides... im sure my 60ft will be much better with the vac secondaries... and all the V8 guys say that the 600 is overboard lol...