My 49-53 GMC truck master parts book number X-152002 (covers model 400-980) makes no mention of the 707 in the engine section, 503 is as big as it list.

Was there an even larger truck that would have used the 707?
Or did the catalog predict an engine that wasn't available after all?

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-