In my quest for improved handling, I bought these:
Holy crap, what a difference. This is exactly what the bronco needed!
They are p/n # 24-065283. They are a tad long; I think ive only got 3" of up-travel with them, but that's plenty for what ill be using this truck for. Theyd be perfect for a bronco with a 4" lift. The valving is 398/94, which calmed the front-end right down. Way better ride now.
As for the B-Code rear leafs; I decided to use the bronco to bring home a whole bunch of flooring for the house the other day, and as expected it handled it like a champ. The B-codes, even when loaded down with cargo, ride awesome in a bronco.