Texasodc IS your name Tom?
Quick fix problems, Driveshaft Get one made quick with the correct heavyduty u joints and correct length. keep the spare one now for the other trans setup. spareparts for now, sell it later as a kit.
If that drive shaft is that long you can damage the trans, NOT GOOD. Call the driveshaft shop, Give them all the info, you should have one UPS or Fedex in the morning.
IF the plug is for the speedo, If you can get this fixed Great, If not who cares about a speedo when on the track. You are watching the guys around you, water temp and
oil pressure, THAT's it. Plug the hole with an expandable coolant plug for now. Quick fix will work. They use them in motor blocks and last for years.
If the slave cylinder is a little off line, slot it, add washers, what ever. This is a temp repair for the weekend. Just want the clutch to work. If you have a syncro trans, Who uses th clutch after 1st gear unless down shifting hard for braking.
Forget about who makes the "U" joints, you are just looking for some EASY track time. They are all made in China now. Who cares whos name is on the box.
At the track add 1 extra quart of
oil to prevent straving the motor on "G" turns and the FE having poor return ports from the heads. It might leak a little. As long as you don't leave a blue smoke trail on the track, you are ok. When you get home, drain a the
oil and refill with the correct amount for your system. If oil is under the car, jack up and degrease it out by the street and wash down good or use a low pressure powerwasher. Let dry, wipe down if you are crazy and road test to clean surfaces of the brakes and rotors.
Worry about the other problems next week with the stress level down and not under the gun with no time to spare. Do go through the car and check every nut, bolt, safety wire, cotter pin for being on tight and correctly installed. Good luck, Have some fun. DRive smart and come home in one piece, that's you and the car. Side note, tell the other half that the event was just OK. Wipe that silly smile off your face when you do this or you will be grounded with out her.
Rick L.