I agree , take apart the doors & look at all the bushings & adjusters , often some are missing or broken . Start looking into other rattles as well , a lot of them are easy fixes .
The front end is basically a must do , figure out how far you want to upgrade things & pull it down , Poly bushings will tighten the feel , larger T bars are a good idea , there are some excellent shock choices as well as improved sway bars , upper control arms & brakes .