I sure would like to see someone come up with a much simpler front engine mount for these trucks.
I would think that polyurethane would be more reliable than rubber. It is more durable thus longer lasting than rubber, especially if it is impervious to oil.
The current design of the front mount is complicated to account for the eventual and unavoidable deterioration of the rubber.
Once the rubber deteriorates and squishes out, metal parts come in contact with each other in order to maintain adequate alignment of the drivetrain. Unfortunately the metal-to-metal contact causes engine vibration to transfer through the frame, resulting in the fillings in your teeth to come loose.
Rather than reinventing the wheel, it would be awesome if someone out there is familiar with modern inline engines which use front engine mounts with a simpler design which can be used as a template for creating one for our trucks.