Hey their Atrus1212,
Yep, like Crewzin said, it was a Prototype from Chrysler and a Company called Dacoma who hand built it directly with Chrysler in a joint partnership to show what kind of extreme possibilities the PT could offer.
It actually showed up on E-Bay a couple of years ago with a new paint scheme which now has a med/dark blue second tone from the beltline up. The Seller specified that the Vehicle was built as a Prototype Show Vehicle only, and had never been registered, or driven on the street, so I am not sure it would pass an Emissions Test if required by State Law depending on your location you would be trying to Register the Vehicle. Here is a Link to more about the Decoma V10 PT.
Decoma PT/10 - Top Ten Viper-Powered Rides - Jalopnik
So this PT was not considered a road car, but if you do a search, their are many other conversions that have been done and are as far as I can tell road cars with no problems. I believe it all comes down to budget, and what you want your vehicle to be. If you have enough budget to actually build a Viper V10 into another Production Vehicle, and you wanted a street legal road car, I would imagine it would not be that much trouble to build it to spec.
At least that is my thoughts. I am sure more people will be along to offer up their thoughts as well shortly.
Go easy, and I will catch you later.
Candyman
I dalso know of at least three Rear Wheel Drive V 8 Hemi Conversions that are Street Legal with no Emissions, or any other problems of any kind.
Anyways,