904 rebuild were to get kit?

So Im rebuilding my 904. Going with transgo tf2, does anyone have this in their car and are you happy with it or is it to harsh going through the gears.? Second were did you get your rebuild kit? Summit,Cope racing and smr transmission has kits. Plenty of kits out there just seeing what you bought and if you were happy with it. People want stupid money for kits and I know there are kits half the price just as good. Any help would be great. Thanks guys and gals Dave