Thom,the US state of Virginia is a title state,and IF the person selling the car to you hasn't changed the title to his name,the original owners name and address will be on the title when you get it.
Many people never bother to change the title to their name when they get an old car because they either bought it to sell and don't want to pay the taxes and fees and wait for the new title to come in,or because they don't want to pay property tax,the area they live in demands all cars on the property be licensed,registered,and inspected and the car doesn't run and won't pass the inspection,or because they just don't get around to doing it.
Zoning and tax regulations are getting to the point in some areas where there is a restriction on how many unlicensed cars you can have on your property regardless of how many acres you own,and you can be fined and have the vehicles confiscated if you don't comply. For this reason some people are listing every car they buy and paying property taxes on them as well as buying tags. It's cheaper to do that than pay the fines. These laws are also responsible for a hell of lot of these old cars just going to the crusher.
At any rate,ask the seller if he has a title for the car with matching numbers. If he doesn't,don't buy it. I can only imagine what a nightmare it would be to get one through customs with no title or a title with numbers that don't match.
IF he has the title but never changed it to his name and it has already been notarized,you need to have him get a clear title in his name and then put your name and address in the "new owner" box and have it notarized and sent to you so you have no customs problems picking it up. If that is the case,ask him what the name and address of the original owner are,or just have him make a photo copy and send to you so you can display it when you show the car.
Virginia MAY offer a title search that will allow you to trace the car back to it's first Virginia owner for a small fee.
If none of that works,you will have to contact Chrysler to see if they have any record. I don't know about this,but will be very surprised if a poster here doesn't make a post telling us how to do it and who to contact if it can be done.
Good luck. I happen to think these are very nice cars to drive and enjoy.
I even just bought a 2 carb intake manifold for my 49!