if you don't have time and you don't have a second car. I would sell the z and get something more practical or at least get a second car while you work on the z. I don't see any reason to swap a tt motor into the car unless the body is in excellent condition and you just can part with it. if you can do the work yourself , I would swap out the na motor and sell the car. if you can do it yourself and you can't get a good deal, I would sell the car with the blown motor.
