As pointed out by the others, you need to change lots of stuff to go to a glide, expensive. You NEED to get the best aftermarket internals available to get ANY durability out of a glide.
Any of the major TF suppliers can get you what you need depending on cost. Cope, Dynamic, Turbo Action, Coan?, A&A?. The parts availability for 727's is great these days. Again I got 200 - 300+ runs out of 727's that I built that were stock except for the Turbo Action valve body & modified front clutch spacer to add the 5th clutch.