Black06, I don't mind the thread-jack, that is good info on these motors!
The motor mounts I used were in the step van I got the motor from. They are a manufactured mount with hydraulic isolation. Kinda like a shock encased in rubber. One stud on top and two on the bottom. You just have to fab a bracket on the truck to hold the mount and then fab a bracket on the motor to sit on top of the mount. I'm not sure where you would go to get a new pair but probably some kind of a fleet truck service store.
Here is pic I robbed from someone else because it shows the mount itself better than any of my own pics.
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Daily - 2005 2wd Silverado with a Cummins 4BT & NV4500
Farm - 1995 4x4 Dodge Ram with a Cummins 6BT & NV4500
Toy - 1991 Camaro with full air ride, a built Vortec 350, & T56
MY PICTURES