77 9/16" across front fenders

79 13/16" outer center tread on rear axle + 6 5/8" to outside of tires

Remove the outer wheels and the rear width is 69 1/16"

38 1/8" from front axle to front of bumper

The standard tires/wheels were 7.50 x20 (6.0 rim section)

As Spanky indicated, 235 Loadmaster was standard engine on a 5700 and a 261 Jobmaster was the optional engine.