Posting this up as a feeler, picked up a complete m30b35 e30 swap. Still undecided if I will get around to putting it in my car so I'll test the waters.
M30b35 from a e24 635csi with somewhere around 200k on the clock.
Getrag 265/5 removable bell housing transmission (best m30 trans you can get) with full shifter assembly
Headers and e34 down pipes, motor was swapped in an e30 so they fit perfect
e28 535 rad, e30 expansion tank and all cooling hoses to work in the e30
Drive shaft and guibo all ready to go in an e30 u- joints all felt smooth with no notchiness
Tested compression cold on the motor, turns over smoothly. Gauge we used was reading a bit high but all cylinders were 160 +\- 10psi so there are no issUes with the head gasket or anything. Previous owner had dRiven the car before he pulled it and said everything felt great and the motor pulled very strong. it was pulled from the car due to severe rust issues.
Any questions feel free to ask. I can probably grab some pics at some point this week