overkill...if there is such a thing. That pump is good to 600 hp. Im using this for now, holds the factory psi fine. Couldnt beat the price.
http://cgi.ebay.com/ebaymotors/FUEL-PUMP-FORD-E150-E250-E350-4-9L-5-0L-5-8L-7-5L-86-89_W0QQcmdZViewItemQQcategoryZ33553QQihZ013QQitemZ230197975941QQrdZ1QQsspagenameZWD1VQQtrksidZp1638Q2em118Q2el1247
Another thing you have to look at is what fuel rail and pressure regulator you have, is it on the intake or was the motor from a vehicle that had the fuel-regulator-return all in the tank pod, then youll need an external regulator or a corvette fuel fiter could be used ( has 3 lines, return is built in the filter)