Ahh, I gotcha. I used the polymer mounts that came with my GP revolver (70"/.60-.90 size) and DLE20. They lasted through two extremely hard crashes (nose first, so the engine took the brunt of the impact) without breaking. They seem to be pretty damn stout. Id think that larger 1.20 size mounts would be sufficient.

Truckracer, what size were the mounts being used, and what engines were mounted on them?

Thanks!