I couldn't find a 2000 brochure but you can download a 2001 from here.
https://www.holidayrambler.com/brochures/
The chassis and engine info are
Roadmaster RM4C Chassis
Cummins® ISB 260 hp Electronic Fuel Injection Diesel Engine: 5.9L
Allison® 1000 Automatic Transmission with Overdrive: 4-Speed
(34PBS Only)
Allison® 2000 MH Automatic Transmission with Charged Air and
Overdrive: 4-Speed (34PBD, 36PBD, 36PBS)