I have seen several folks use a stock 1.5 or 2 ton AD radiator in a 1/2 ton with 350, and they say it works great.
The big truck radiator core is approximately 2.5" thick, I'll go measure exactly if you are interested?
It also bolts in just the same as a small truck radiator.
If that works for you, my original, with a 48 date stamp, could be available, send me a PM if you are interested. Because I have a feeling I'll need the aluminum one, I'm looking at the Griffin aluminum ones that are supposed to be a mostly original looking (other than the aluminum part) bolt in deal.
Grigg