I picked up a cab off craigslist and it came with the title. So I figure, since I have both titles in my name, my trucks and the cabs, that I could do a cab swap and not have to worry about a VIN swap sonce I have titles with both VINs on it. I believe that if you wanted to switch the VIN numbers from your old cab to the new on you have to take it to the MVD and have it inspected.