Take your old one, or the measurements, to the auto parts store. They will have them in stock.

My 52 2800 has Spicer 1350 series U-joints, I think a 3/4 ton is the same.

If given a choice between Spicer and another brand I always choose Spicer, they seem to be stronger and last longer, and don't cost much more.

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-