A rear mounted turbo would have the added advantage od losing a lot of heat, in the long discharge pipe that runs from the turbo to the carb hat (or, injector.) There is that advantage to consider....
Actually near the back of the car is a bad idea..... The system will loose a lot of heat from the exhaust manifold to the turbo impeller... that is energy for the turbo and is important in getting a quick spool up.
Keep the exhaust connection as short as you can and use the wrap as shown on the J pipe too. I'd add a brace on that turbo mount.
