But the GT30R is the "GT3076R" #700382-12, CHRA 700177-7? You can find it on page 32 of the Garrett Catalogue.
The GT3082R uses a 82mm GT35 compressor, so its a hybrid of the GT30 turbine with a GT35 comp.
The Garrett's GT3071R on the website are all the T2 type which are rated around 450hp because they have the cut down 56mm turbine, integral wastegate and T2 flange. In the T3 flange and uncut 60mm turbine config, its then you can get upto 500hp.
Funnily enough they do not list the GT3071R in the T3 housing and the uncut 60mm GT30 turbine. But all you have to do is throw on the T3 housing on the proper cartridge and you're done.
Anyways come to think of it, if he doesnt mind the lag and he can rev to 9000rpm, maybe the GT30R or even larger might have to be the go.
Anyways I'll leave it at that.. gettin messy the thread. Discopotato03 can add some valuable information to this discussion IMO.