i have and 1987 buick GN not a T type but with plenty of get up and go has a 70 mm turbo just need some inter work and paint still have the black inkee or i have skinnys for front and nito for the back it the one in my picture it was paint since then but they didn't do a good job was a rip off.
i'm waiting on my turbo to come back from being redone. if i don't find one ill just buy a new one. ya there hard to find I've been looking for one for a while but still no luck i think i'm just going to have to buy one there still not that much but every penny saved would be nice.
i'm running any where between 17 to 30 psi with a 70mm turbo i'm adding some more stuff to it like a blow off valve a 400 walbro , wide band o2 new header the old one are cracked just got some off ebay for 227 stainless steel headr the look good.