you can look on the valve body...the year should be clear on both sides,and on your converter it looks like you could put it on a lathe and turn the hub down to the size you need...just a thought.
I have heard that the hub thickness isn't sufficient to remove that much material without either seriously weakening the hub, or that you can actually cut into "air" if it was machined thin enough, originally... in either case, not a good idea.
