Oil Leaking out of the turbo exhaust...

[tuekwik4u]

First time I post on this web site hoping to get some help. I recently bought a sand car with a Buick 231 with a turbo. From the number that is on the intake, it seems to be a 1980 Buick engine. Two issues I'm having....
One, what turbo did Buick use that year and two, I have oil leaking out of the exhaust pipe .... lots of oil, with a lot of white smoke! Would appreciate any help. Thanks.

 

[bison]

They used one like this:

If you have that much oil in the exhaust and there isn't obvious thrust play be sure the drain back is adequate

 

[tuekwik4u]

It looks the same. Only this one has AiResearch M11 stamped on it. Do you know the actual name? Im trying to order a rebuild kit for it. Thanks!

 

[tuekwik4u]

New to turbos, where and how should I test for drainback? Thanks