My buddy runs the same turbo you are talking about 75mm comp with the 96/87 1.32 t6 housing and he has a custom comp housing with a bushing welded in to make it 2.6. He runs it with a ppumped 24v , big 13mm pump, 30* timing and 4500 rpm, 6x.24 custom injectors. It makes around mid to upper 50's for boost IT lights at like 3000 but he has not had a problem staying ontop of it yet. We tried to get a 1.10 housing and it was going to be custom made because there is not a stock app for that. It was going to cost like $750
Im going to run the s400sx which is 71mm comp 84/74 turbin with a 1.10 t4 housing. Part number 177248. I drove the truck today and it ran good until it blew the freeze plug out of the block.
We have a whole motor kit from Terry sittin and waiting to go together when my brothers 300,000 mile motor finnally decieds to let go,. Supposably this kit we be sweet. 14 to1 compression, a big cam that i dont know what size it is but required somewhere in the neigborhood of .250 valve reliefs. Takes a certain piston with real low ring lands.