I did win the auction. $858. I'm not sure whether it is a 4100 or a 4400 and it is about 400 miles away. I bought a 73 C-30 so I can go get it. (Actually, that one is for my wife so she won't gripe at me about mine.)
The VIN is 9JKD14760 and I can't find a VIN decoder right now that will tell me much about it except that it is supposed to be a motor home with a GVW of 4000 to 5100 pounds. (?)
I realized form the start that it would require major mods to become a highway cruiser, but I have time on my hands.