I am working on the door windows on my 63 Jetfire. I was looking for door handles for the car. I had a few sets of 1967 Cutlass/442 handles around and they looked the same. Took a set and they are the same handle 1963 thru 1967. Just get a set of reproduced handles and bolt them on.
Another thing! I was rebuilding the rear brakes on the Jetfire. I got a set of rear wheel cylinders off Ebay. Come to find out they are the same wheel cylinders as the 64 thru 72 Cutlass/442 rears.