Of course, I haven't had a chance to dyno it, but the difference in power is that again of the wonderbar, for those that have done the wonderbar upgrade, you know what I'm talking about. The stock runner set up didn't pull too hard above 5000 rpms where this set up pulls hard past 6500. I don't drive it every day, but drivability has not changed at all from before.
This is what I upgraded:
Runner: SLP siemese aggressivley ported
Rockers: Crane 1.5 aluminum narrow bodied
Injectors: Ford Motorsport 28 lbs @ 40 psi
Home made adjustable fuel pressure regulator.
Coming soon : complete stainless mandrel bent dual exhaust system.