Another Montrealer and another sixer owner. Here's my '87 635 CSi. I've owned it since Novemeber of 2009 but unfortunately had to let it sit for a year while I took care of some other things.
Finally got it out last summer and after a good clay barring, cleaning and polishing I so far have replaced the exhaust, wheels & tires (Style 5's on Flaken FK 452's), radiator, various belts and hoses, various steering components, floor mats, control arm bushings and put H&R springs/Bilstein shocks on this summer. Also recently threw on 10 mm spacers upfront and 25mm H&R Trak spacers in the rear and installed the front license plate delete. Waiting on a new lense to replace the cracked passenger side fog.
Car has 144000 KMs on it, is Alpinwhite over black leather, 5 speed manual with a Racing Dynamics kit from back in the day.
All in all lots of fun to own and drive in the summer on nice days and to tinker with in the garage on not so nice days.