ok you CAN keep the stock fuel pump but with something that age it is likely to fail, and if you boosting when it fails POW your done. take my old 87 TC for example, when i lost fuel and ran lean, i was boostin 16psi strong running 3rd gear and when i lost fuel i blew a hole in the piston and scared the side wall, long story short, she was DONE. if u read on the forum sites i listed the 255hp is a common fuel pump because you KNOW that it can handle just about anything i throw at it. if your running a stock 2.3T setup the stock pump will work, but if ur planning any upgrades, go with the bigger fuel pump and a fuel pressure regulator so u know how much fuel is going to the rail. i can tell you right now before i even put a 2.3T in anything, or buy another 2.3T car ima upgrade the pump first!
i agree with davis, the holset is good for something you plan to run on the strip, its made for high end boost at high revs but also im a firm believer in if you already got something, it doesnt hurt to put it on. you may like it or eventually downgrade a little to some faster spool up.
just from expierence, dont go slack on fuel system. id rather have more than i need and know its there, than take the chance on blowing up again.
good luck with the build, keep us updated on it. i think ive decided to keep my ranger stock and do the cosmetics and then get a 4cyl mustang and do the 2.3T swap. im a mustang guy at heart
