The 60-1/T3 Hi-fi can be used with intenal wastegate too.Unfortunately we do not have a dyno so we do not know the exact power but its good for up to 650bhp.I have another one ordered for a 600bhp 2.3lt Mitsibushi Evo 4 .If you like I can give you the compressor wheel,Turbine wheel sizes and part numbers.
About the ex housing I use 0.63 A/R

Roger