Alright guys i'm seriously lost and confused when it comes to turbo sizes.. i.e trims and a/r's so in short someone willing to help me out i'd appreciate it.

senario.. i have a stock b16 engine that i'm building a turbo kit for and plan on running low boost.. why? stock engine andi don't want to kill it.. BUT in 4-5 months i'll have a fully rebuilt/resleeved ls block to swap in and want to produce about 450whp.. now is there such a beast that i can boost with the b16 and have good spool times and acheive.. 200-260whp with out breaking alot and then being able to boost into 450whp with the same turbo down the road.. i'll be running 3" pipes and everything for the higher boost.. just need to know if i'm going to have to put in a diff turbo or not. I know i'm going to have to go and get it tuned again but is there a turbo to suite my needs?