So you are set fast and hard on a 66? There is a 67 Roadster with 427 in that same auction, it is Lot 28. I like the split window coupes myself. If I get tired of the Goldwing, any cash from the sale goes to a bucket list similar to yours, either an older Vette or Shelby AC Cobra.
As far as rust here in Florida, yes you will find some because of the high humidity and salt in the air if you are on the coast. East coast cars suffer from it more than west coast ones , I think for two reasons, first the wave action and resulting salt spray is heavier on the east coast. Second here on the east coast they let you drive on the beach, not the case on the west coast.
I know that the last time Barry and I were in Punta Gorda we toured the Muscle Car Museum and it was greatly reduced in size from the first time I toured it a number of years ago. The original site was an old Super Walmart store, it was huge, the one Barry and I visited was big but more like a regular supermarket size. The owner is always buying new inventory, so maybe he is just clearing the way for new show cars.
Well if you buy one down here in Florida, let me know, I will be happy to go and pick it up for you, I drive to the house and store for a while. I would of course keep it exercised regularly. 😁