I am thinking of doing a turbo myself. I start planning on some AFR's and all that, but I've driven and run into so many turbochaged cars. A turbo will turn a dog of an 4 banger engine into a beast, I could only imagine what a turbo would do to a v8 that's allready got the beef!!! Turbo kits are way expensive, and so many people have had hard times getting all their parts, time, ect. I think if they sold them in one box such as like in superchagers, more people would buy them. I figure I will do it myself. I am looking into buying a welder anyways. Maby next winter. I've got so many plans for my car it isn't even funny. I'm planning on doing a P/S delete next, this will help make room.
BTW: I would not pay very much for a junk yard turbo, especially out of a old car. Your better off buying a unit off a rebuilding company. There are turbo's everywhere. Volvo turbo systems seem to hold up well, Saabs, Audi's, many cars came with them along with air-to-air intercoolers, you have to fabricate anyways, so get what you can that's good. Supra turbo's seem to work nice, and many of the Supra guys alway upgrade to a single larger unit, they probally have a few laying around. I hate taking a hand-me-down from them, but it will pay off.
When you go to a junk yard, don't tell them what you are doing, they will want to jack up the price, I know how j/y's are. Say you have a beater or whatever you are trying to get the turbo out of and you just want it to run right.