I have a 90 GT that I turbo'd as well as put #42 injectors with matching MAF and 255 LPH fuel pump. My question is how much fuel pressure do I need to be running with this setup? It currently runs between 41-44 psi on the rail, do I need to be running more than that? Would it make a big difference if I put an aftermarket fuel pressure regulator on it? Its also running rich and seems to be loading up on idle (there are no vacuum leaks), if there is anything I can do to get it to run better than that short of tuning(chip) I'd love some suggestions. I'm also curious about how others who have put larger than the factory 19 lb injectors on their Mustangs and how they behave.