The one ton pickup is often the more desirable of the pickup trucks.
I have a 52 Chevy 1 ton pickup and would never trade it for a 1/2 ton.
If you want a truck to use keep the 1 ton, if you don't need a truck then the 1/2 ton may work for you.

If you have to, the cabs are all the same until the really big trucks, the tractor trailer size ones get bigger. For the 1/2, 3/4, and 1 ton, all of the sheet metal is the same, with the obvious exception of bed and running board length. Fenders, hood, grill, and running boards change, but are the same for the 1.5 and 2 ton.
The GMC trucks bigger than 2 ton have larger fenders and such, and eventually, the biggest ones everything is different.

I would hope you could leave the 1 ton together and find a suitable 1/2 ton if that is what you have to have. You could probably trade someone for a 1/2 ton if you asked around here.
If I had a 1/2 ton I would trade for a nice 1 ton in a heartbeat.

Good luck,
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-