[1/4HORSE]

I've got a 2000 gt with some simple mods(pulleys, throttle body,etc.) I'm planning to buy a blower some time this spring or summer.(don't know which brand or type yet) I've read at many sites that both the tranny (t45) and the bottom end of the 4.6 is kinda weak... What I'm trying to find out is #1 How much boost could I run ? #2 How much hp and/or torque can the engine and the tranny withstand ? #3 Is there any preforance to which brand or type of blower I should look into i.e.(vortec,paxton,roush etc...roots type or centralfugal) Thanks for all your help.