Just to follow up on*fixing the VCF:
Your discourse on your web page was quite helpful and gave me the impetus to get the thing done. However, I could not find any way that seemed "proper" to fix the fan pulley while trying to remove the Allen bolt holding the VCF. In fact, when I got it apart, I could not find any way to restrain the pulley, even being able to access both sides of it for inspection. What I did do was to hold it very gingerly with a pair of vice grips, being very careful not to deform the pulley and then fix the vice grips with a screwdriver. It's not elegant, but it worked.
I found that the bimetallic strip was not as pictured, but was rather more of a equilateral parallelogram with the fingers at the ends to fit under the retainers. There was a cross bar over the pin on the VCF with an adjusting allen bolt in it which bears on the VCF activation pin. The adjusting bolt was frozen and too delicate to muscle out, so I ground the bottom nib off and the VCF adjusting pin now appears to be fully extended.
When the VCF pin is fully extended, does it lock the fan mechanically, or through the viscous function, i.e., with pin fully extended, should I be able to rotate the fan independently of the pulley?
BTW, while I was at it, I figured out how the radiator comes out. It's like the one you show on your 500 and the thumb screws in the middle of the posts which pierce the upper radiator support member unscrew and allow the radiator to be lifted out at the bottom, I believe.