Well, SuperdadSC and I swapped out his FMIC to a double IC to see if it eliminated a lack of power problem when in boost. Thinking that we had a leak somewhere we wanted to eliminate that as a possibility. It took all afternoon but we got it all changed over and took it for a test drive. Now instead of falling flat at 3psi of boost we were able to get it up to 8psi at about 1/2 throttle. The sc is overdriven 15%. The regulator is an adjustable and the fuel pressure gauge we had showed 40 psi at idle which seems just fine. The exact problem is that the car runs great until the boost comes up to about the 8 psi mark and the power just falls to nothing after that. It doesn't misfire or run rough it just smoothly noses over. Back off on the throttle so the boost comes down and it picks right back up again. This is the same regulator that acted like it wasn't delivering any fuel at first. After cycling the ignition switch several times when pressing the shrader valve, nothing came out. Eventually we got the pressure up and it seemed to be Ok. Unfortunately we weren't able to test the fuel pressure while under load. It's been driving fine except for this. I've suggested that we swap the sc pulley out to a standard size and see if lowering the boost helps. It's got a 10% overdrive jackshaft pulley and a 5% sc pulley right now. I'm wondering if the regulator is the problem though. This wasn't a problem before the old motor blew up. Anybody run into this before or got any ideas?