And the radiator, too. The a/t makes a lot of heat and the air/oil cooler is not sufficient. You need the primary water/oil cooler in line first, then the air/oil. You can have a water/oil cooler added to your m/t radiator if you wish, and take the opportunity to have your radiator rodded out and pressure/leak tested at the same time, since they have to take off at least the bottom tank to put the cooler in.

Or, I don't find the m/t all that hard to rebuild, especially since I bet all you need is input shaft bearings. The rest of the bearings are pretty stout and hold up for a long, long time, which means in turn that you only have to tear into the front of the tranny (step one in a full tear down) and all that is very simple to do once it's out. If the tranny is quiet in 4th/5th, the mainshaft and 5th gear bearings are probably fine.

It would seen to me to be worth doing it in this order. First source all the a/t parts but do not buy them yet, then pull the tranny and see if the input shaft wobbles around. If so, I'd fix that and put it back together and install a new clutch kit at the same time, regardless of the age of the current clutch. If not the case, then go buy the a/t stuff and install that.

Also get the a/t console...