Yeah, a few strange things on an otherwise very nice car. The 352 produced after your 365 isn't so strange. The 365 was an option so it's not odd that 352 cars would be produced in an amongst 365 cars.
The positive battery cable is very weird and is suspicious that there was probably a bad electrical "event." The owner should have cut the catch tank brackets completely off. And I agree that the location of the antenna is pretty strange. Given the condition of the seats, 27000 miles is lower than I would have expected.