I've got a similiar setup on my truck...some different componants, but basically the same deal. It helped, but I doubt it added 27HP.
If your going to up your fuel pressure, make sure you have something to check your A/F ratio. No use dumping extra fuel in if the engine can't use it. 14 psi is a lot if you don't have a lot of mods, and a small change in psi can make a big differance in how rich/lean the engine will run.