or dont bother with regulators or fuel rails all together,
stock rails and regs can still supply me enough fuel for 800cc injectors at 70% duty and 1.7/8 bar manifold pressure, still lots of room to move, and thats with a boring old walbro pump.
chris, you'll probably need to convert to top-feed injectors to make use of the perrin rail, and with that you'll need to swap to the 02+ sti manifold and throttle assembly, issues this presents is that the idle controller on the new manifold does not work with the autronic, and there is nowhere neatly to mount the coil-pack from a my99/00, the fuel injectors also will also need new clips and plugs to be changed on your existing harness, and you will more then likley need to source injectors, going aftermarket on top-feeds usually requires collars or some form of compromise to make them fit and quite often leak if not installed correctly.
food for thought nehow
