I have an 85 s that I have yet to install my poly bushings on the rear...yet I can hear alot of squeaks from the rear .What do you think I should check?

 

muffler mounting, sway bar, glass gasket, junk in the trunk,spare tire,gas filler mounting,and anything else that might come loose, gas tank mounting, bumper brackets , jack , the whole damn car is built of squeeks and rattles.