what should my FUEL PRESSURE be at WOT?

I'd retitle your thread and try and get the supercharged guys in to help you. What's the rest of the set up besides the booster and injectors? Are you running any kind of fmu? If not, it wouldn't surprise me if you're outrunning the 24's at stock pressure.

I wasn't making any judgements about your setup -- I asked the questions because you didn't include all the pertinent information in your original post. As I said before, I think you need to specifically target your thread to the supercharged crowd. They probably have the answers you're looking for. If it were mine and I was wondering about my a/f ratio, I'd either take it to a dyno with a wideband and find out what the mixture is; or install the proper sensor and put in an a/f ratio monitor. Those are the only way to be certain - every other approach is pretty much guessing.

I have an ATI Procharger P1-SC @ 11psi on mine, it has 42lb injectors and a calibrated MAF. I also run the FP at 40..