Hesitation at WOT in 1st!?!

[Blaster]

I cleaned my throttle body(59mm)with carb cleaner, checked the wires(not burnt, and even sprayed that stuff that pops if the spark is jumping on the wires, my plugs look OK(Delco, or should I be running something else in my 6037's for a plug??)I also changed the fuel filter and checked the TPS again. I still need to check the fuel pressure, but if that looks fine I'm thinking maybe new O2 sensors(Have never been replaced), and/or a adjustable regulator to get more pressure?? My car dosen't even break my 245/50R16's loose when I nail it from a roll and I'm getting frustrated. Should I try a motorsport 65mm TB with the new TPS on it just to make sure my electronics are not screwy??? Please help.