In addition to the above:
If this is a 360, did you add the weight to the damper?
Is this happening with wide open throttle or with light cruise or moderate acceleration?
Can you please list these parts inside the engine: Pistons, heads, head gasket, cam shaft. The objective is to see if you really have that high static CR level, and to see if your DCR is high. Also, to check on engine balance issues.
What fuel are your running? OH, I see the info in your post... 87 is gonna be a detonation source with that compression level unless the cam is reeeeeealy biiiig. (Unless you are about the best tuner in the galaxy!) Even 91 is going to be a challenge.
You are missing one part of the equation in the total distributor advance. There are 3 parts:
- Initial
- Vacuum (which you have)
- Mechanical which is internal and separate from the vacuum advance.
With all 3 going on, your total advance at 2500-3000 RPM and above is likely in the 40's or even 50's range at light to moderate cruise. So that is the reason for the question above about when this happens.
The concern is clear: With that level of static CR, too much ignition advance is possibly going to cause detonation and that may be your violent shaking. Did you have the vibration before you put in the vacuum advance?
As for the heat, if you have higher compression, the combustion temperatures are considerably higher and that will often mean you need a bigger cooling system capacity. The AL heads are making it even worse. So while you may be 'patching' up the heat issue with more ignition advance, it is not likely really solving the prime heat issue.