RARELY will you find a manufacturer using an MCI chassis, ..Mostly individuals "doing there thing" The "maker" will be a bus company. It's a different world,, I have owned two and assisted with several more ( GMC MCI Eagle Gillig Flxable Prevost.) Usually the manufacturer will have a nomenclature tag in a visable place,, but home builders will remove these tags.>>>Dan ( Look under the drivers seat in the forward storage bay to find the original VIN # stamped in the left front frame rail.)
The Detroit engine will have (if not removed) a nomenclature tag on one of the valve covers giving the specs for that engine.)