TCI heavy duty 904 rebuild kit will make tranny handle 550 hp

I would assume that TCI is not the only one out there with a heavy duty kit
I have heard both good and bad about their transmissions
I can’t afford a 1500 plus trans no w it would set me back six months
I bought the trans and converter for 200 plus the kit for 250 filter misc total 500 I’m going to build it myself
If it blows I’m not really out that much