Yes
Correct
Yes
In PA you know it's about the money. First you need to re-register it as a Antique vehicle. Then you need to request the use of a period correct plate. Local tag place can do this. You pay them to run the check to make sure the number is not in use. Since they are notary they validate the plate you want to use. They send the paper to the state. Their fee and the state fee. Plate is valid, good. Not done yet, now you pay the same fee when you registered it as an antique to use the classic plate. Oh, I also bought the plate off ebay. Finding a good 1956 truck plate (steel painted back then). More money than I wanted to pay, but then I was committed, had to finish the process.