What kind of power are you going to make?
In general it is hard to put too large of a fuel pump in a car, except for some of the race pumps that really pump a lot.
A T-rex and the stock in-tank is good for about 425 or so from what I have seen...maybe a little more but those factory 87 to 93 pumps vary quite a bit so if in doubt change that baby!
A 255 in-tank and T-rex can get you up to about 550 at the rear wheels, which is the point where the factory fuel rails really start to become a factor. Your engine could also be a factor as well, how much fuel it requires (efficiency) can affect this. No matter what you do, if you decide to shoot for big power with those pumps make sure they get plenty of voltage and watch your factory fuel pump relay, a 255 will draw a lot of juice and the factory relay can get hot and shut off especially if it is a few years old.
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91 coupe, SVO block 380 windsor, Brodix Neal heads, Super victor spyder intake, 90mm Accufab, 160 lb. Bosch injectors, D2-R procharger, Dynamic powerglide, 4500 stall, 9" rear, Speed Pro injection. 1047 hp at the wheels on Dynojet dyno with 23 lbs. of boost.
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