1976 diesel F-29296

[wbostow]

Help! I can't figure out what I'm looking over:

1976 Blue Bird motorhome body # F-29296(can't find the word Wanderlodge)
It's a diesel, factory service number 125680.

Chassis serial # 9455
Engine # 20147287

It has a diesel Onan 12,ODJC-3CR/2701AA generator and three rooftop ACs. Could
those be original?

Is this a "Wanderlodge"?
The ususal fold-down dining table area has a counter with drawers. Could that
have been an original option?

Would that be a CAT diesel propulsion engine?

What are the odds of getting engines working again without rebuild after 2+
years of non-start?

I can't find VIN locators and don't find any diesels before 1977 on the vintage
Wanderlodge site.

Any help would be appreciated including where to look or whom to call. Thanks!