Another SS Spring Question

It appears that there is such a beast as a P369045X SS leaf spring, but I can find zero specific information on it.

Not finding any specs for it is one of those things that can keep you up at night. :coffee:

The right pack does have more leaves than the left one (two half leaves from the axle to forward perch, eight total) and as it stands I don't have any issues. But as I am in the process of adding some substantial horsepower, I'd really like to get the specs on this thing....