Ask your local tire shop, and or some of the antique tire folks that advertise in old truck magazines.

Also consider buying new or used 19.5" wheels (probably Accuride #29015) and using 8R19.5 tires. Check your local truck tire shops again, and junk yards, and http://www.ricksontruck.com/

I would go with the newer 19.5" combo if you're not concerned with originality and plan to use the truck a lot. If you get wheels at a junkyard you may find this is also a cheaper option, tires may also be cheaper now and in the long run.

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
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-