In New york its simple. On the registration form there is a section where you can ammend the vehicle information. All you do is write in. "Vehicle converted to diesel,permantly installed" And you will be issued a new title which states diesel. A plus is the inspection is then only $10 as opposed to $35. Safety only no emissions and no Dino!

You can also say get Passenger plates on a pickup as opposed to commercial plates(In NY no commercial vehicles on Parkways) by writing in "Cap and seats permanently installed"

Worked for me many times. Mike

__________________
1983 300TD
1983 300sd