Just finished my m50 engine swap. The car is my daily and i managed to hydrolock the original k-jet m20b23. Luckily i sourced a new engine within a week and started with the conversion. Engine is a non vanos e34 m50 with 68000k and start to finish the swap took 8 weeks. I think it could even be done in half that time, as 4 weeks of that was waiting for the ally welder to mod my sump.
il start with a few of the car from before the swap.