Can anyone tell me what engine this bus has based on these photos. I just know it's a diesel. Chassis is by International Harvester. Body by Wayne. Any other comments on it? What is the 'Wayne Lifeguard' unit to the left of the driver and should I be concerned about the missing switches and lamps? I'd want to rip out what the owner has done to the interior and start again. What about the missing rear window, is that easy to replace? Thanks.
Addendum: Found this on Wikipedia (assuming this bus is a Wayne 'Lifeguard').
"The standard powertrain was a Chevrolet 366 6.0L gasoline V8 according to 1987 GMC Chassis Brochure, with a Detroit Diesel 8.2L diesel V8 in either naturally aspirated ("Fuel Pincher") or turbocharged configuration"