IF THE BRACKETS LOWERED and happened to pull the rearend foward at the same time--it could very easily bang into the trans at launch--it could be tipping the nose of the rearend down and at launch it drives foward under power while raising up :shock:
set the car on the tires and measure your wheelbase longways / sideways and diagonaly to see if everything matches properly to the original measurements
then raise all the tires off the ground[ keeping it level side to side] and do the measurements again
if anything is crooked it will show :evil:
check your new brackets for tightness and ripping in the welds/ fasteners/ and brackets--i have seen new stuff FAIL alot :idea: :idea:
LIVELY