In case anyone in phoenix is looking for an M90 motor. That's 219HP stock, and a ton of torks. 
http://phoenix.craigslist.org/nph/cto/5126823384.html

http://phoenix.craigslist.org/nph/cto/5126823384.html
Not that it matters, but it has to be a 1977 or above, no 635 produced in 1976 per Real Oem. As an E24 owner, I would love this one to be restored, quite rare.