what 4 speed auto transmissions can i use? 46rh etc

Thanks for clearing that up. I really want the easier option of the a500 but I am not sure if it will handle the 550 to 600hp
I have phoned several transmission shops and some say no problem and others say no way.
I have also asked some guys using the 904s but same answer. Yes and no.
Anyone running a stock a500 behind bigger hp?