I might be wrong, but since the 3200 was a 1/2 ton, I think it came with six lugs instead of eight even as a Napco. The 3600 and 3800 came with eight lugs.
Sounds like you have a 3100 cab on a long bed with some Napco 1/2 ton and 3/4 ton parts.
The VIN tag was spot-welded to the door frame from the factory. If yours is screwed or riveted on, it has been replaced.
You can also check the VIN stamp on the frame. Some states are real picky about requiring that the two match. I doubt that yours will match because of the long bed/short bed situation.
It is not uncommon for these trucks to be built with parts from many trucks. I looked at a truck a couple weeks ago that had a Utah title saying it was a '59, had a numbers matching VIN tag on the cab that was riveted on, had a build tag that was not original, and had a frame stamped VIN from a '58. I walked away because there were too many discrepancies.
Here in AZ, if you have a title for a cab with unmolested tags, you are usually OK if you put the cab on another truck and have the title follow the cab. Problems can arise otherwise, particularly if it is obvious that the tags have been switched.
Don't fret. As Dave recommends, check with your state DMV. If you can't get a title the 'normal' way, they might also have a process to get a bonded title or an abandoned vehicle title.
It could still be a great truck. Just be sure that you can get it titled before you buy it would be my advice.
Matt
