[msullivan]

What change are need to install TDI drive train into an originally gas powered jetta?

 

[Fluid]

Lots. The fuel lines and gas tank, all the wiring from the dashboard forward and the engine bay, the ecu, basically you want a donor car.

 

[msullivan]

will the o1 engine go into a 97 without major work ? The 97 had a diesel.

 

[chittychittybangbang]

no, the engine bay and mounts are different. A swap should stay with the same body style. For example, mk3 should stay with mk3 and mk4 engines fit best into mk4 bodies. The mk3-mk4 mounts are totally different.