few prob. please help

okay where shall i start well this is a 85 jimmy s15 with the 2.8 and 700r4 now prob one i cannot find where the tranny leak is coming from but i know it likes to get rid of ATF asap and other thing grill is bad and metal from grill to bumper is rusted i was wondering if i can swap the 4 peaces for a 1 peace 92-94 jimmy grill without modifcions is it direct bolt on? there are alot to fix on this i need it running good soon cuz i use it to go to collage and back every day