Hello Gary H,
You were asking the group for info on the auction of a inline dual quad 62 Plymouth 1 of 50 cars. I have a 1962 article about the dealer installed 413 and your choice of intake and carburetors. I can maybe scan the article when I get back to Florida. As far as the car in question, it could be genuine 1 of 50 but I THINK it would need documents to prove this from the dealership that did the work. I still have my car that was supposed to be a real deal dealer installed 413 inline dual quad car also. I have to call it at clone due to lack of the dealership receipts.