Hello and welcome Sunger, I know of one 64 dodge polara 440 that originally came with a 426 street wedge auto golden anniversary for sale and the man wants 7500 and it's a major project! I'm talking the car's been sitting outside for 20 years. The body and interior is complete but it's rough. The motor in it now is a 440. The VIN on 64s is not as nice as the 68 and later years but you can get basic info from the 64 VIN but it helps if you read alot and do your homework. Try out this website
http://maxwedge.com/ Darrell Davis also makes great ref books that are very awesome! I have 4 of his books and I don't even own a car from the maxwedge/street wedge era.
That's a very nice car. Good luck.
Juan