I’ve looked, there never were Timken tapered roller bearings for the AD 1 ton front axles.
The roller bearings that were available were special, made more or less to order for the restoration parts supplier, they did not carry a normal part number, we’re not available anywhere else.

The ball type bearings have served me well so far in my 1 tons. Just read the manual on adjusting them, not quite the same as you may be accustomed to for tapered roller bearings.

•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-