COE tire size

What are the stock 20" tires for my 1947 Chevy split rims?

 

I was told 7.50x20 were what should be on it, but they are not very common. Right now I have a 8.25x20 on the front left wheel. I cant make out the other tires that well because of the dry rot on the sidewalls.

 

I was quoted $250 per tire, including liner, tube, and mounting. I guess thats not horrible.

 

Originally these trucks came with 7.50/20's, on the front, & 8.25/20's on the back. That is if your truck is a 2 ton. I usually run 8.25/20's all the way around, on my 2 ton COE's. The larger tonage rated GMC COE's came with larger tire sizes, depending on the sizt truck. My 1952 GMC 470 series, 3 1/2 ton COE, came with 10.00/20 tires front, & rear.