Looking at your sig. and not being familiar with your exact build;
I’m not sure what you were expecting. Your cam is very mild with very small restrictive (as cast) ports of the 302 head. The cams 112 LSA should have had added compression from the pistons in order to negate the lower torque output from the wider LSA. If there was a tire diameter increase, this would slow down the car as well. Added stall to the converter would help the launch. But it should not be needed for a cam that size.