Problem with supercharged 94GT, please read (long)

[Killercanary]

My cousin has a 94GT with a Kenne Bell blowzilla SC, 190lph fuel pump, FMU, stock injectors, stock MAF, off road X pipe and cat back. He jsut put the blower and FMU on it in december and all was fine until his fuel pump quit and he replaced it with a 190lph unit. At the same time he added a new clutch and bassani cat back. Now the car will buck under partial throttle, and when you get on it at WOT and shift gears it will fall flat on its face and throw a check engine light. We pulled the code and it was a 158, which is a too high MAF voltage. The only thing I could think of was that either the MAF was bad, or it was running too rich now. Well tonight I put on my MAF from my 95GT, reset the computer, and took it for a spin. It did the exact same thing. Now I'm really thinking its running rich. I figure under part throttle the fuel pressure is still pretty high with the FMU and 190lph pump, and since the vacuum is low under throttle, the fuel pressure is high too. I think that under this condition it is running way rich and drowning out the spark. The same goes for under full throttle. As soon as you leave off the gas, thr throttle body closes and the air is limited that's going into the cylinder, I imagine there is some unburnt fuel under this condition too. Well as soon as you change gears the throttle body blade opens, the vacuum goes down and the pressure goes way up again, I think that so much fuel is being dumped in so fast that the car is sort of "flooding" out till all the air gets in there and burns. Does this make sense or does anyone else have an idea? Things were fine until the addition of the pump, cat back, and clutch. Please help ASAP as we hope to make it to the track this weekend for the season opener!