Well, if anyone that has/had the thudding issue like I do, Marlin says it's because there's no bushing kit installed
So if you're wanting to fix the sounds or are going to buy the Bilstein's, I would advise to get the kit.
I think I'm going to just deal with it for now until I feel like opening up my rear suspension again
I don't think it hurts anything, except your ears and for me internal fear that it actually is hurting something
As for the different height measurements, yeah..
Still no idea
Parked it on a flat road and all 4 at 22"
Drove back home (the roads here are terrible) and they were all different again
But the front since alignment has been a constant 22 1/2" up until when I just measured
I guess it's a good thing they all measured the same but to only have driven about 65mi (again, really bad roads around here) they have all sagged down 1/2"