kawi600

Ive got a DTT buildup in my truck thats got 75k on it and it doesnt seem to kick when it shifts like it used to. Im also wondering if its part of the reason my fuel economy is in the toilet.
I thought about installing a master overhaul kit in there and maybe upgrading to a triple disc TC. Possibly raising the stall speed a little to help with spool.
Whats the best setup for a trans that will hold about 600hp these days?
Truck is getting twins and injectors this winter