Are you sure it's really squatting or are the tires geting smashed from the hit? Right now, mine is at 75% anti-squat and still hits the tires so hard on the launch that it balls them up even with 8 psi in them so I'm making a change on the 4 link to about 52% to take away some hit. If it starts squatting too much you can stiffen the bump on the rear shocks to tame it somewhat if you have double adjustables on there.
George