I recently bought a 1976 Dodge Tioga for $300 and it has similar problems. There was a bad leak in a couple of spots and, above the cab-over sleeper and above the restroom on the rear causing extensive damage to interior walls and paneling as well as floor damage to the rear section, i have proceeded with gutting the interior of the motorhome removing all interior walls and clearing it for restoration, any and all info you have on your project could be usefull to me as well and visa versa. One problem I have had was that I can't remove the shower pan once I demolished the bathroom so now I just have to move it around the inside as necessary. also I can't seem to get the fridge out yet but if i remove the driver and passenger doors the fridge may fit through there but not through the entry door at the rear of the motorhome, or the windows. as for the built in couch/bed that also housed the fresh water holding, pump, plumbing , and hot water heater I have to figure out a new couch/ bed that will accommodate a space underneath because i don't think I can reuse the old one. I have some ideas but I am new to all this and not really a carpenter or mechanic but I have some knowledge. Do you need to replace any of the floor in your motorhome? if so what have you learned about the process and how is your project going so far?
Peace, Clay