Mafia... I think your better off grabbing one of garretts internal gate turbine housings.
For the street I consider the GT35r .82 on an RB30 with a 5speed only 'just' bearable. That counts out the GT35r on an rb25 UNLESS its behind an auto which makes a massive difference as to the way the turbo comes on. To be honest a GT35r .82 behind an rb25 auto feels similiar to that of a GT35r on an 5speed Rb30. Its quite freaked out how the turbo loves the auto.
Behind the RB25 5speed used for the street... I would go the GT30r running the 76mm 56t comp wheel; .82 internal gate turbine housing, possible grab one of ROGUEPI on ebay (who's AMOSITE here on SAU).
He flogs the internal gate GT30r's for the low to mid 1700's. The GT35r internal gates go for high 1700's. So well priced.
GT3540r Internal
GT3040r Internal
He had the GT3076 floating around yesterday, can't find it right now.
and the port shroud adaptor he does.
Steve who used to own an r33 some years ago ran a HKS3037S which is essentially the GT30r 76mm 56t comp wheel with a nice little comp cover. RoguePI sells little insert bits that bolt in to your comp cover inlet to make it similiar to that of the HKS comp housing. Running 23psi I think it was, cams, plenum, exh. manifold he made 323rwkw. Also on a stock bottom end that had a thicker headgasket slotted in to drop the static comp.
Ran well and never let go. He ended up returning the car to stock and selling.
I'm not sure if its possible to use the same comp cover; I'm guessing yours is the 52t 82mm comp wheel? The GT3540r's run the 56t comp wheel. Disco will know.