Well I am officially MACKLESS  My RB is sold and The rd I looked at had too many issues. It was a bad sign when I pulled in and saw that it had an air ride cab sagging low in the back. I said "nice it has an air ride cab" and he said "no it doesn't it has been that way since I bought it 2 years ago". I said "see that little deflated airbag that means it is an air ride cab that hasn't worked for years" and so I proceded to find air leaks, compressor would build to at least 150 psi, frame rust spreading rails almost 1 inch but I asked before I drove 5 hours south and he said "oh the frame is nice and tight" and "the truck is mint".  I really don't think he knew it was a double frame or much else. No coolant in resevoir and engine didn't look factory to me. I would say engine was replaced or done at some point but no one knows for sure. I wish i had researched difference between e6 and e7 because it had some different features than my rb with an e7 oh well. He said he would drop 1000 dollars so i didn't even risk offering him anything and insulting his immense knowledge of trucks. On the plus side i did like the serco loader and ran that and would be happy with one. It was also a nice day with my father along for the ride.   OH btw I saw lucerne tractor headed southbound Good Looking Rig!