I was looking at the new turbo kits that they have for corvettes and how they place the turbo behind the rear axle due to having no room in the engine bay. They only lose one psi of boost with this setup and you don't need to change the exhaust manifold to attach the turbo to the engine. I think this kind of setup would work great on a 122 since the exhaust pipe runs the full length of the car. Just attach the turbo to a bracket to hold it to the car, attach the exhaust pipe to the turbo using a flex pipe so the exhaust moves with the engine, run another length of pipe to the ait box on a weber or air box for a dual su's and then you would have a turbo for a 122. You wouldn't need to build a special exhaust manifold for the engine and take up the room. Only thing I notice you would need a electric oil pump to pump the oil from the engine to the turbo. The setup shouldn't cost more then a 1000 dollars.