Nice work, pretty soon you will have a completely restored truck if you keep at.

Did you forget the cotter key in the parking brake linkage shown in the second link?

With everything in the driveline rebuilt it must be bad tires then? Do you have some different wheels and tires you could try?

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-