Yeah I know, but according to Western Chassis the same spring is used for both, I kinda wonder about that though??, but according to all the weight charts I see BB is a 110lbs more, so if I put the front end on a diet, shouldn't be too hard to get rid of a 100lbs or close to it I would think, but it's all just theory ******** and I'm sure I'll end up taking it apart a hundred times before I get it right, lol.. But right now I gotta figure what I need to do to drop JGG, wife dropped the hint a couple days ago, lol..... But anyhow, I'm sure the OP has a SB so it should give him something to think about..