Looking great!! I hope you keep the original look with the stock wheels and tires. Check my webshots page and take a look at my 1951 GMC that I just sold. When I bought it the wheels were black with old worn out tires. I pulled the wheels and had them beadblasted and painted to match the color on the body of the truck, and wow, it really worked out well for me. I think on your truck, you could go both ways, either paint the wheels black, which would be a nice contrast with the gray color on your truck, or go with the body color. I bought BF Goodrich Silvertown tires from Coker and it really set the truck off. I have seen factory photos and postcards showing the GMC trucks with the wheels either body color keyed, black, or cream/white color.
I like how you did the bed wood black, not all show pine like alot of other people do. I think they came black from the factory any way.
Take good care of that sweet looking truck!!
Good job!!!