The M3 housing itself should bolt the Ti knuckle, I think it has been a while.
The M3 knuckle/hub is offset so you have to run all the M3 frontend together to get the steering angles all correct.
The M3 strut insert fits in the Ti strut housing...
http://www.318ti.org/forum/showthread.php?t=33746 The 1995 M3 springs fit in the Ti housings.