I do not recommend US-67 from I-40 to McAllister OK. Horrible washboard road.
I would recommend either US 71 to Texarkana / I-30, or I-40 to I-44 in OKC to Wichita Falls. From there US-281 is a good road to I-20 south of Mineral Wells, or you can take a series of Texas and US highways to join 20 at Abilene. The roads are good.
If you do come to the Dallas/ Fort Worth area, stay on the outer loops, the south side freeways are best.
We drove AZ 95 from Bullhead City to Quartzsite in early Dec. it is a nice drive with not much traffic. While there are some grades, it is nothing like the grades on US-93.