85cutlass

ok guys! I'm having problems with my 85 cutlass LQ4 with a cam and 850 demon carb. Going up to the lanes get a burn out done getting ready to stage then the car sounds like it's flooding out. Go back to the pits change the plugs because they were black with a white tip. After changing plugs and driving back to the lanes it sounds like it's flooding out again. I have a 6010 msd. 84 squared jets in the carb no power valve. Timing is set at 34 square coils regulator is good and so is fuel pressure floats set right at the bottom line. 33 squirters