Yes there are larger 19.5" tires...
But what will your wheel width be? If you use standard GM 10 lug 19.5" wheels as far as I know they only come 6" wide, which then pretty much limits you to a tire as large as a 8R19.5.
I suppose having custom wider rims made is an option. I would try to get a good idea how it would all look and fit and what it would cost before taking that path.
I still think original 20" wheels and tires are the best option for most folks who won't be taking long road trips and regularly hauling stuff.
Then for those who want a more modern truck the 22.5" wheels compliment the other changes (axles, gears, brakes, more power).
The 19.5" wheels if they fit over the drums could be a cheap (used tires and wheels) way to get a truck on the road, may run slower and look funny, but driving is better than sitting on blocks in the driveway.
Grigg
