Question? I understand the shims that go under the front pivot mount to give the truck various degrees of ato squat in rear motor config. I have set mine up for mid motor though. Other than letting the screws pass them to go into the tranny, why are the inserts used for anti squat too. and do the shims and inserts need to match to get correct antisquat. My kit is built per instructions and it looks like the shims alone could get the job done.