Grigg -- Measurements off Ole Charlie:
In stock configuration, running 7.50x19 tires
Outside of sidewall to outside of sidewall: 65 11/16"
Top of wheel sidewall to fender opening (top): 3 1/2"
Turning clearances
front of fender opening: 2 1/2"
Back of fender opening: 2"
At full throw (wheels at full turn), the tire is 1 3/4" from the rear springs (limiter at front is the shock (single action) and the clearance appeared to be 5 or 6 inches or more).
If you need more, let me know. Looks like I came within spittin' distance of Ghostrider's radial-equipped truck (beautiful truck BTW!) But I think you have less than 2 inches to play with before you run out of schlitz on the wheel opening.
Thanks for the support Steve Sr.!
Hope this helps.
John