Not sure how good of an idea a transmission flush is with that many miles on your tranny. It could be more detrimental to the transmission than helpful. Buying some replacement intake boots just so that you can have them on hand when one of them does tear, would probably be a good idea because they will tear and/or rip eventually. Be sure to check your valve cover gaskets. Purchasing a replacement for that is something I would recommend as well. Fuel filter if it hasn't been mentioned already.
Dreaming of the ///M.