With Truckernix comment about the missing bolt (thanks) I looked around for other fasteners and there is a collar with a horizontal screw around the right side of the distributor. That was loose also and when tightened, the distributor rotates only as far as the vacuum advance will permit - this seems correct.
I took a picture of it here:
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https://plus.google.com/photos/1139...7801054018&oid=113956755236860259179)
Now that I know how to tighten it down, I will adjust the timing. Q: Would you recommend I use the timing light from a top view (under the hood) or do I have to go underneath the front bumper and see it from below?
thanks