Thanks guys. From what I gather, the Superliner 16k and 20k fronts have a 4” width leaf spring with a spread of 54”?(can’t remember actually distance). I just did a complete 20k swap into a 1986 super rw700 with 3406b.
it was hard to find it. Looking for another, 14klb front takes a beating hauling heavy, 50 ton plus loads. I also read any MH model will have a front end that will work.