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1. Not sure, but what rah0ul said has been observed before. Sorry about this.
2. The windows on these cars are just not very fast compared to modern cars, keep this in mind.
3. In addition to what you mention, the idler bushings can be worn, the ball joints can be worn, the steering coupling can be worn (difficult to replace, but not that expensive); the steering box may be in need of adjustment (extremely difficult, but doable, with the steering box in the car) and/or rebuilding (removal is nasty).
4. Work from the top to the bottom. Change the valve cover gaskets (fairly easy) BUT...the covers are very thin castings and they will definitely warp if overtorqued (which many are, in a futile effort to stop leaks from shrunken gaskets). Get new gaskets AND the little crush washers under the valve cover bolt heads, and torque to spec as per the manual. It's a very small torque, and I bought a 1/4" torque wrench specifically for this purpose. Stopped my leaks dead cold.
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