Longer Shocks
So it turns out the rear shock studs (both upper and lower) on my car are 11/16" or 0.688" not 5/8. I don't know what they should be from the factory, but that's what I've got. It appears 11/16" is sort of an oddball size. Skyjacker and Energy suspension both claim to sell 11/16 ID polyurethane shock bushings, and both were actually 3/4" ID when they arrived. Google searches were not helpful in finding vehicles with 11/16" diameter shock studs.
I ended up ordering 5/8" ID Prothane polyurethane bushings and boring them out to 11/16ID on my lathe.
The rear shocks I settled on were a pair of Skyjacker M9527. They are 24.9" Extended and 14.9" compressed, the right length to work with my superstock rear springs. I was going to use Bilstein 5125 shocks (the Skyjackers are actually supposed to be a copy of the 5125s) but in comparing them side by side the Skyjackers were a bit firmer.
Got it all together and took it for a short test drive today. Feels a little firmer, but not harsh. Here's the before and after:
So it turns out the rear shock studs (both upper and lower) on my car are 11/16" or 0.688" not 5/8. I don't know what they should be from the factory, but that's what I've got. It appears 11/16" is sort of an oddball size. Skyjacker and Energy suspension both claim to sell 11/16 ID polyurethane shock bushings, and both were actually 3/4" ID when they arrived. Google searches were not helpful in finding vehicles with 11/16" diameter shock studs.
I ended up ordering 5/8" ID Prothane polyurethane bushings and boring them out to 11/16ID on my lathe.
The rear shocks I settled on were a pair of Skyjacker M9527. They are 24.9" Extended and 14.9" compressed, the right length to work with my superstock rear springs. I was going to use Bilstein 5125 shocks (the Skyjackers are actually supposed to be a copy of the 5125s) but in comparing them side by side the Skyjackers were a bit firmer.
Got it all together and took it for a short test drive today. Feels a little firmer, but not harsh. Here's the before and after: