help with A/R & trim

[xM3x]

ok, when i got my turbo it was a t3t4 60-1 .70cold .63hot stg3 trim(t3high flow?) 2.5in 4bolt flange. i posted this a while back and from the info i got was that i needed to change the housing and trim wheel to .82hot and a stg5 P-trim wheel. when i sent my turbo to the company to have this done.the guy said that .70cold .63hot w/3' 4bolt flange with stg 5 P-trim will do the 3.2L going for around 400-500 hp fine. i dont know why he would say this? what do you guys think? will this do me fine? or do i need to go to the .82hot side?

thanks

Aaron