The mounts come with 4 red urethane bushings and 2 black. The black are higher durometer, and the instructions dictate you install the black bushings in place of 2 of the red ones to limit driveline rotation. One on the top one on the bottom opposite the torque couple of the engine.

Has anyone expirimented with these bushings? I'm thinking of installing the black ones right off the hop.

 

OK I'll pilot this project. But it won't be for like 4 or 5 months.