Dennis,
I think you are describing the rear differential mounts. If that is the case, it is not as easy as you think. You need a special puller or you will have a hell of a time trying to remove them. I know, changed those suckers myself!
The mounts are around $10 each, the tool is around $100. I discussed this topic before, do a search.
Big difference afterwards.

__________________
J.H.
'86 300E