To use a solid rear trans mount ?

[Mitch Perkins]

We use the urethane mounts on every car built in the shop. With 1/4" front and mid-plates, or with the .090" mid-plates ( which I consider obsolete, 1/4" mid-plate helps to transfer torque to the chassis and the thin steel plates distort). Never had issues with breakage, However, the ones built with solid mounts at the least cracked the mounting bosses on the case even if the housing survived.