Figured you guys would get a kick out of these. I finally killed my worn out original VANOS at the last CCA track day @ Lime Rock. The noise was ridiculous and the cooling system is of an unknown vintage, so I dropped the car off at my buddy's shop for a "Dr. Vanos" kit and a full cooling system PM including the hard pipes under the manifold. They texted me these photos after removing the valve cover and VANOS, and commented that if someone had told that them the motor had 50k they'd believe it. Very little varnish, indiscernible wear on any of the moving assemblies, and the timing chain guides are in fantastic shape:
As far as oil changes, this car has always had fresh BMW 5w30 every 7-8k miles, and just switched to Redline 15w50 for its first season of track driving.
I've done a ton of work to the suspension and whatnot, so all the car needs now is some rust remediation and I'll consider it done.