Mark,
It's fun hanging on with your fingernails to the dash while trying to hold the yoke with the other, ain't it?

It happened on the ground, at Reid Hillview (RHV) just after I had fueled up. A very nice guy with tools helped me swap co-pilot and pilot seat backs and on got me back on my way in less than half an hour.
Now, you will wanna keep in mind that they changed the seat rails some time in the early 70's. So, I believe you are restricted with seats from 1965-1971.
Thanks for the info.
Yes, I saw those and was considering them, but they are for 1977 model, so according to Bill, they won't work. They don't look quite the same, either.
I'm looking around, and will also consider Shelby, although the Shelby option would ground me for quite a while.
This problem will not prevent me from going to Alvord, as I could fly with co-pilot seat removed.