i have done a few A/T turbo setups. As long as you keep the boost to 7-8psi ( With a T25 setup) it should last a long time. Its when you get greeedy and want a lot more power that isht goes wrong. Get an Avenier turbo setup, bolt it on, run W/G spring pressure and call it a day. its another 100hp bolt on and makes 190-200whp and will last all day... Beyond that i'm not sure.
In a P11 A/T this is a great setup and is actually fun to drive. it doesnt make the car a dog and it actually will move pretty good and smooth.