Welcome to iRV2.
The Eaton transmission would be a real worry ( JMHO ).
Also you didn't mention the year of the coach, or the chassis manufacturer, and being from Ontario you know all about rust issues. Rust and Rot never sleep, and if the chassis manufacturer is no longer in business , finding replacement parts for a rusted out chassis component could have you sidelined for a long time.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.