Cab decisions??

[idonutn0]

Heres the deal...
The 72 truck I have a title for has a horrible cab on it, rusted floors, rusted roof, theres rust in places that shouldnt have rust but it is titled. I can get a parts truck ($200 complete) that is from Mexico and the cab has the usual floor rust but no rust anywhere else. It dosent have a title though.
Is there some bit of "magic" that could turn a cab with no title into a cab with a title?
I dont want to get into any legal trouble, but who actually looks at these things? Who matches up the numbers? Dont people remove the VIN tags to paint their trucks sometimes?
This is all hypothetical at this point. I want to know if I should keep looking for another parts truck or not.

Thanks for the info.