Looks like a truck smaller than 9700, so the manual you found should be perfect.
What's the weight rating on the tag in the door, the serial number too? I'd guess it'll say 16,000 lb which is a nominal "2 ton" truck.

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-