My words are not gospel but should be close.
The coach I believe was built on a Spartan chassis with a 275 Cummins first gen turbo diesel and Allison tranny.
What to look out for:
The big one is body delamination; where water has gotten in between the 1/4" Luan and outer fibreglass body. The Luan rots out easily and the fibreglass body loses adhesion. Look for wavyness or bumps in the body.
Roof condition and sealant
Leaks, discoloured wall treatment or curtains will be a give away for water leaks.
Subfloor condition and soundness.
Test every button, lever and system. If it turns something on or off, turn it on or off to see if it works; and I do mean everything. This will take you at least four hours to do properly.
Per Mare, Per Terram and may all your campaigns be successful.
“It’s a recession when your neighbor loses his job; it’s a depression when you lose your own.” "Harry S Truman"