My changes are mostly subtle.... at least till you pop the hood....
Exterior wise....
The paint and bodywork were all redone to a very high standard (but in the original color and such).
The wheels were changed twice. When I first got the car, I changed from the 14" non original alloys to square 16" Alpina style set.
Then when the car was restored, Don installed a staggered set.... still 16" Alpina look though.
Interior....
The interior is mostly stock... though now to a much nicer quality and fitment....
The OE steering wheel was replaced by the PO to an M1 type (was the M1 wheel when I bough the car)... then Don changed it to the one you see in the later picture.
The dash wood was redone as well (by Bela). I had the center speaker removed (MUCH cleaner look IMO) but color and finish were to OE style.
I also had the clock removed and had a repurposed fuel/coolant gauge installed that now reads oil pressure and volts. Looks VERY OE, but isn't.
When I got the car, it had a 1980's era Pioneer stereo installed. I sourced and installed an original Blaupunkt Frankfurt stereo (modified to accept external input). The speakers were mounted facing fwd under the rear seat. For me, sound quality was not really a priority, but I wanted something to use on occasion...
Engine/chassis...
The PO installed Carl Nelson lowering springs. I kept those....
I had the later brakes installed in place of the 2800's disc/drum set.
I had the 4 speed removed and a 5 speed installed.
The 2.8L M30 was needing attention so I had Don build up an M90 (w/Megasquirt) that, when see it - looks like a 'regular' M30 CSi. But - one stab on the throttle and you know immediately it is NOT stock. LOL
Here are a few pics that were posted of the car when I bought it back in 2008 and a few I took when I got it back up to Seattle just after its restoration.
They show how the car has not really changed (in appearance) all that much - unless you know what the details are. And that is what I really appreciate on how this turned out.