my 88 5.0 has 201000 miles and the other day i popped the hood and noticed that my core supports rusted off of the frame.will this be expensive to fix i really dont want to put too much money into it.The body is really rough but it runs really well.

 

A new core support is about $120, plus $80 for freight. You might check with a local salvage yard. They may have a good used one or can often order a new one cheaper. IF the mounts to the frame are rusted out, you will need to repair/replace those and replace the bushings.