1975 Kings Highway owners manual needed.

You may be able to get some info from other owners of the same vehicle at http://www.irv2.com/forums/. They have a vintage RV section that is very active and there are a lot of people there doing restoration work on older models.

There is no such a thing in print that will do you any good. Owners manuals for RV's are not like the automotive industry. Wiring is done by hand on the assembly like and can vary from rig to rig as they come down the line. As for the appliance manuals, simply make a list of each appliance and them go to the mfg web site and look for manuals particular to your model.