How much HP will a stock 500HP fuel system support?? Pumps,water seperators,lines,etc..still running a single 500hp carb..

I was told that the stock set up is good to around 625-650 hp.

I'm rite on the edge of that hp range..so could I go with some electric pumps with regulators and leave the 3/8 fuel lines and water seperators stock??

Summit sells an aeromotive marine electric pump that is 7 psi max. I assume it has an internal regulator.it is 90 gph.anyone have any experience with these?Any pros or cons I should consider?thanks