so ive been saving a while for a transmission rebuild and im getting ready to do it in the next month or two. a local diesel performance shop quoted me $4200 and this was the description. billet torque converter,billet sonnax upgrades,high energy frictions,extra frictions in all clutchpacks,dunrite valve body upgrade and torque converter lock up. they say its good for up to 500rwhp im going to start with a edge juice w/attitude but i want to do a Bd or ps turbo and 100hp injector upgrade later on will this transmission be sufficient? it says nothing about flex plate or billet shafts do i need those to be upgraded as well? any comments are appreciated thanks.