Camaros had them too.... but years are different for them, they are not 67-69 , not sure if both fronts and rears are different by years ,but I know at least one of them are different by years and fronts are different from rears (attachments)
I've never seen one cut open but I have heard that they have a cast iron weight inside of them which is suspended between springs above and below. The canister is filled with an ATF fluid. Holes in the weight allow it to move up and down with the fluid flowing through the holes dampening the movement.
I recently read that Corvair used them prior to the F-Bodies.
These look to be 67 shakers, and look the same for Camaro and Firebird. the 68's differ from the 67's. I'm not sure, but I've heard that the Camaro/Firebird shakers were the same for all 3 years?
Not sure on the actual fluid, have heard many versions of that, but never heard the mercury one? ATF sounds more likely...
Just returned from a cruise night in our town. There was a Corvair convert there so I checked it out. Sure enough, there were vibration dampeners in each corner.
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