I have a pair of ball bearing 6262's but they don't have a Buick ex housing and I would prefer to not split them up. Guess that probably doesn't help much but I thought I would mention it
I PM'd you before about a different turbo, but we just got a used 6176 dual ball-bearing water cooled turbo in the shop. 3" in, 2" out, GN exhaust housing. $600
You could check with mike at full throttle for the spec. I went from a 49 turbo to the 6152e, car pickup three tenths of a seconds. Turbo is in good shape, you will have to use the accuator off your turbo.