The '65s were transitional, meaning it may or may not have certain parts that changed around that time.
If you windshield frame is like the early 1500s, it will have 3 short "rods" on the top edge for the bow of the top. Later cars have 2 holes for the latches on the later bow. They are not interchangeable.
Later spindles with disc brakes will swap over, but you will no longer be able to use the stock 13" 1500 wheels.
Tons of roadster info and board at 311s.org