They are fluid filled. Don't break one or nasty smelling oil will fill your garage floor, and the mount will be junk.
The drivers side mount is going to be bad on almost any Mark VIII. The loads generated on that side of the car seem to destroy it. I will be doing a custom mount here shortly that will cost less than $20, and will not wear out. Stock price is around $90 I believe. I have seen aluminum mounts as well, but I don't want the noise or the cost of an aluminum mount. Mine will be rubber. More to come.
The drivers side mount is going to be bad on almost any Mark VIII. The loads generated on that side of the car seem to destroy it. I will be doing a custom mount here shortly that will cost less than $20, and will not wear out. Stock price is around $90 I believe. I have seen aluminum mounts as well, but I don't want the noise or the cost of an aluminum mount. Mine will be rubber. More to come.