This is the handling forum. If a drag application you might find more informative responses it seems in the Race forum.
If indeed a handling question, use a 22" front segment leaf if possible, and upgrade to a fiberglass leaf in whatever spring rate you chose, and save 50?lbs, use a double adjustable shock, like a QA1.
Anything but a KYB. eyes

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.