Severe bucking at WOT

[gray87GT]

Well, things are definatley different on the street. The car runs sweet when just cruising or under normal acceleration, but when I put her down it bucks like hell. I am really hoping it is a fuel problem, lack of. I haven't installed my 190 fuel pump yet, or the 73mm MAF. I did have my buddy watch my fuel pressure gauge and when I floor it, it goes up to 40 1/2 then down to 37-38 (it is set at 40). Can anybody clue me in on what the problem could be?? Thanks

------------------
87 GT, BBK shorty's, offroad H-pipe, ASP pullies, 70mm T.B., Cobra intake, no smog pump, Windsor Jr irons, Comp cams 1.6 rollers, F303 cam, H.D. export W.P., Tri-Ax, FMS subframes, Battle boxes, SSM liftbars, FMS King Cobra clutch, mass-air conversion, 73mm C&L, 24lb injectors, BBK fuel pressure regulator, 3/8" no EGR spacer, and other piddly sh*t.