wierd noise when going over bumps

check ur tailpipes, I know mine hit over bumps and stuff and it makes it sound like something is loose

ECU5.0 have you done any suspension changes recently? I did my recently and added caster camber plates and when I had the car aligned the camber plates are not fully adjusted cuz on an '89 there is not to much room for the adjustment. I have to make the whole where the strut comes through a bit bigger. I'm getting the same sound that you are describing, metal against metal. The guy who aligned the car said that once I make the holes bigger, then he car realign the car and hopefully that will cure the problem. Just my two cents. Hopefully you can figure out the problem. Good luck