Don't go it alone...
Jointed Rail, if you intend a safari to the land of lunacy, let me know if you need a guide...:hehe:
The differences are significant between the SD80 & SD90-H.

The differences are significant between the SD80 & SD90-H.
- Placement of the rear sandbox
- Design of the dynamic brake housing
- Flat top engine hood on the '80, beveled on the '90
- Ten doors each side of the 20-cylinder, more than on the '90-H & the SD90/43
- Class lights
- Walkway arrangement behind the conductors side of the cab.