Doober, it was bothering me so I went online and checked. Autozone.com, Advanceautoparts.com, and Rockauto.com all list same part number for all rear upper and lower rear bushings. Of course these are stock/OEM replacements. What you may recieve when ordering aftermarket poly bushings due to the way they want you to install them may be a whole different matter. It has been a long time since I installed a set. I wouldn't use the poly bushings myself, just my opinion though. The one car I put them in went from pulling the front wheels with completely stock rear suspension with rubber bushings, to wheel hopping with new poly's installed. A buddy of mine had the same prob with his Monte. If you are going to drive it alot, stick with the rubber ones, if you are going to race it, go all out with full adjustables and rod ends. Again, just my opinion. Been playin with these damn Gbody's for over 20 yrs now!