Well after spending 2 years running the truck with the ttb and solving my camber issues, I’ve decided to swap it. Yes, I would keep a Dana 50TTB for a stock height truck, yet as most of you told me, lifting it is only a headache. After many trips off-road and my rears and frame flexing more than the front springs it’s time to 60 swap it. I plan on taking 2 of the short springs off of the near flat 5 leaf “soft ride” pack, RSK the front from SKY 2.5” lift, trac bar and be done. My question to you honest guys is can a superduty D60 99-2004 use OBS springs? Can a 70s D60 use OBS springs and swap fine? I’ve found 2 in the 85-97 models, but I just want to see what my options are. Thank you!