I know it has been a while since I posted this thread and ordered the leaf packs, but I wanted to come back with my first update. Due to my work schedule being mostly evening and night shifts, I have had precious little time to work on this. As of this writing, I have successfully installed the passenger side leaf pack. Completed one side this evening. Had some difficulty getting the old one off, and ended up having to cut it off due to the bolt metal bonding to the metal channel inside the bushing during the last twenty some years, but after that the 3/4 ton 5/1 leaf pack was a direct fit and I had it installed in no time. It was actually a nice side by side comparison between the two leaf packs having one of each on there this evening. The new set has much, much less "give" to it when pressing down on the rear bumper, and I am anxious to get started on the driver's side on my next day off. I've been taking photos each step of the way that I intend to come back and share once I'm done. It may be a while yet, but I will be back with that update once I have both sides done. Thanks again to Havoc for providing the link and recommendation, and to everyone who commented and helped me out with advice. To those considering a similar upgrade, definitely go for it. I am quite pleased with how this is all turning out, and I am eager to come back and share photos when I am done. That way, those who are also thinking about this can see for themselves what a great upgrade this is.