what are some imporant mods to do to the auto tranny to hold around 600whp?

i know 2 oilcoolers( one with a fan), stall converter, and more line pressure....

but what converter? for a daily driver/street strip car
how would i go about getting more line pressure? is there a seperate tranny control modul?
where can i buy tranny parts at? or should i just swap over to a TH350/400???

sorry for the n00b questions....i'm a n00b

 

boostlogic.com they rebuild the tranny to withstand that type of power

 

checking them out now, THANK YOU!