I wish I’d had this view of things when I replaced the motor mounts. There had been some odd things with launching the car from a stop that I decided were because the motor was torquing on its mounts. The Camaro uses a mechanical belcrank setup between the frame and the block. While the motor mounts were in better shape than I thought they weren’t bolted down properly.
Unfortunately I’ve found another potential culprit in the subframe bushings and/or their mounting points.