The 702 V12 was in GMC trucks from 60-65?.
They were offered in a COE and a stub nosed truck. Also in some Walter snow plow trucks.
Many of them were used on irrigation pumps in the Midwest.
I don't know if they were offered for sale as industrial engines any later than 65, but I am guessing not.

Some great info on the 702 can be found here:
http://www.6066gmcguy.org/TwinSix.htm

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-