so Ive been running JGC springs in the rear of my truck for some time. I found these springs in the junkyard, I believe they were aftermarket as I was unable to identify them in the usual fashion. they are super beefy. they gave me a bunch of lift but the ride was rather harsh. so I got rid of them and replaced them with a pair of AC springs. The ride is MUCH better but the truck is stinkbuggin like crazy. I have a 3" suspension lift in the front and it way higher. I'm wondering if the