Euro 323Ti swap M3 euro engine enquiry ?

[gilou-bilou]

Hi,

I have an 98 323Ti, and i investigate the possibility to swap an euro M3 engine.
And i have a lot of questions in my mind ...
- Which engine is easier to swap in car with already an M52 ? An 3L ou 3L2 ? I ask about that to the point of view of an OBD1 or 2 and so on.
- Can i kept my tranny (S5D 250G) ? It is reliable ?
- The wiring it is an big probleme, if i chose the good engine (obd) ?
- What i have need if i kept my tranny ? Only the complete engine with ECU ?

Thanks to help me, to clarify this project in my head ...