Im in the process of building a 500+bhp escos and was looking for some advice

ive gone from owning a mitsubishi evo @ 600bhp to now owning a escos big turbo and want to get big power out of it.

I was wondering what sort of internals,turbo,clutch etc you reccomend ?

a good friend of mine is running a GTX3076r turbo set up on his car but i didnt know if there are any better on the market at the mo ?

Any help would be greatly recieved

cheers