The best of both worlds I think...
Forget the solid motor mounts, too much vibration transferred to the chassis and the driver. Take a regular motor mount and drill a 1/2' hole thru the mount perpendicular to the motor. Install a grade 8 1/2" bolt thru the hole with heavy gage fender washers on both sides and secure with a nylock. Leave about 1/2" or so of play in the bolt. The motor will now torque that far and stop. This gives you a solid mount when you're heavy, but a good insulator when cruising or idling. I went thru motor mounts too quickly when I started, and this has eliminated the problem of tearing the mounts apart while keeping chassis vibration to a minimum. Very unobtrusive as well.
