| Yellowstone | 8356Y | 8386Y | 8390Y | 40UL |
| Chassis | Workhorse | Workhorse | Workhorse | Freightliner |
| Engine | 300 Cummins | 300 Cummins | 300 Cummins | 330 MB |
| Fuel | 100 | 100 | 100 | 100 |
| GVWR | 28,000 | 29,500 | 32,400 | 32,400 |
| Length | 36'-4" | 38'-8" | 40'-2" | 40' |
| Width | 100" | 100" | 100" | 100" |
| Height w/AC | 12'-3" | 12'-3" | 12'-3" | 12'-6" |
| Interior Height | 84" | 84" | 84" | 90" |
| Wheelbase | 228" | 252" | 264" | 260" |
| Fresh | 70 gal. | 90 gal. | 90 gal. | 90 gal. |
| Grey | 75 gal. | 75 gal. | 75 gal. | 75 gal. |
| Black | 75 gal. | 75 gal. | 75 gal. | 75 gal. |
| LP Gas Tank | 115 lbs. | 115 lbs. | 115 lbs. | 115 lbs. |
| Furance BTU's | 40,000/25,000 | 40,000/25,000 | 40,000/25,000 | 40,000/25,000 |
| Water Heater | 10 gal. | 10 gal. | 10 gal. | 10 gal. |
