[shark7000]

That gives me some good info. I hadn't read anywhere that the newer yolk would fit the old drive shaft until now. I'm glad I don't have to buy a special one. For now, the four speed is stuck in 1st, or 2nd, and Rev. I don't know how that happened. The guy that was doing some body work parked it in the driveway, and when I went to move it, it would not go out of gear. I tried and tried and somehow got it to go to Rev. but now it just goes nowhere and smokes the clutch if I try. But this project has been put on hold since my son got his graduation gift, 87 Supra, that I have been doing the body work my self, and other repairs, getting it read for paint, so he can drive it. If body work was my thing, I could have been done a long time ago. This is something I am now learning to do. Once that's done, I'll be back to working on the Mustang.
As for the other post about the missing cylinder, the raw fuel smell from the exhaust makes me feel sick when driving in town. On the high way, there is enough air flowing to not bother me. It doesn't smoke, so I really think it's the valves. I haven't done the compression check yet. I've been too busy with other things for now. I need to make a new push button to make it easier to. I lost my old one.