Chuck, the first thing to cover would be the bushings. They are the most dangerous when they go bad IMO. My suggestion would to get some of Bryan King's aluminum SFB's, they're not that expensive and easily replaced. Something to also consider is checking to see if the subframe plate nut recall has been done on your car. You are, I believe, considered to bein the rust belt and this is done at no charge to you at any Ford stealership that has a service department. You can call any stealership and have them run your VIN to see if this has been done or not if you're not sure. You could have the new bushings put on there if you have a decent working relationship with them if you don't feel like doing the work yourself.
Honestly, you really don't want to drive with either bad, but I drove with bad bushings (I didn't know it at the time) for a long long time as well as motor mounts. You just have to take it easy, especially now that you know you have a problem. I don't think that in the beginning stages the mounts will hurt too much, but eventually you're going to get rub marks on your intake that won't rub out, and they will eventually propose a safety issue.
We all get frustrated with our cars at times. But keep in mind that it is an older car so things are going to wear out no matter how good the outside looks. Also keep in mind that it is no different than any other car....they all break, all parts cost money, just that ours tend to be a little more expensive for the SHO specific ones is all.
Good luck with it all, keep us posted. At least now you have a better clue as to what the problems could be and a goal to reach. After you do the bushings and motor mounts, don't neglect to have the steering components checked, especially if you still have torque steer.
