What's the price for the replacement of the engine mounts on a 92 Cadillac DeVil

What is your question?

I get a rattled on my passenger side when I drive over 55 miles an hour my steering wheel shakes somewhat I've gotten numerous wheel alignments

What makes this problem better or worse?

When I exceed the speed of 55mph

How long has your 1992 Cadillac DeVille had this problem?

A couple years