The front mount and the section of crossmember are stock for the 78 GMC 6500 the engine came from. It is actually just like the stock 216 mount just a tad bigger.

The rear mounts started as rear mounts for a Louisville Ford truck. Like would have come with a 3208 Cat, and even the gas v8 engines too.
I bought new rubber parts and made the engine side. I machined the frame side from what was originaly the engine side of the ford setup.

The rear mounts hang all of the engine and trans less about 125# on the front mount.

Not to confusing is it?
Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-