In my opinion weight is the key factor. My 1976 All American BB has springs all around and rides great but weighs 24,000 pounds the way it sits, add a couple motorcycles and a weeks worth of food, water and I am over 26,000. Drove a buddies RV with an 8.3 with 3060 and air bags all around and I keep thinking we were going to turn over in the curves of the road, just mush suspension.
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