N52 AWD Swap Poll (maybe N54 too?)

[AWD_E30]

Inspired by reading Nando's comments about the N52 many years ago I started down a rabbit hole of what it would take to do a full N52 drivetrain swap. I've been collecting a lot of parts and 3d scanning them to figure out what can be used. There are quite a few things that need to be custom made in order to make this possible and compromises along the way. The current list is below and I have no idea on costs yet but figured I'd check in with others to get feedback on the list already.

Question: How do you feel about the list of changes below? It is likely a road too far for most people.

• N52 Drivetrain (Engine, Transmission, T-case, ECU, wiring, pedal, etc.)
• Custom Subframe (for faster rack to clear E83 diff)
• Custom Motor Mounts (stock plausible but not identified yet)
• Custom Oil Pan (relocate diff for E30iX chassis)
• Custom Axle Adapters (shaft to adapt E83 inner to E30iX outer)
• Custom front driveshaft (likely shortened stock E83 X3)
• Custom AWD Controller (TBD but CANTCU can allegedly do it)
• E30 --> N52 Adapter Harness (available from places like Condor)
• Electric Cooling Fan (likely in front of radiator)
• Custom Exhaust (DIY)
• E90 Steering Rack (Cut, drill, & tap to maintain bump steer)
• E83 front diff, half shafts, & CV shaft support
• Body Modifications
  • TBD - Cut/Shape Driver's Floor (driveshaft clearance)
• Ground Clearance
  • 30mm lost in front & rear
  • Can improve by cutting Rear floor & driver's floor more
• Loss of A/C & other compromises likely

Other things to note:

1. E83 (X3) front diff has 3.91 ratio available and there are limited slip differential options.
   1. E53 (X5) is also an option but harder to package
   2. E60/E90 aluminum housings appear to not be as strong so I am avoiding
2. N52 manual transmission ratios are not great with iX stock gear ratios (~3750 RPM at 70 MPH)
3. E90 steering rack not cut down would be similar to current fast rack option offered by Bav All Rad

I'm also looking at a custom subframe that would work with stock engine setups but allow faster racks to bolt-on.