Narrowed beams and spring rates??

[axam48ida]

does anyone know what the spring rate is for a stock link pin beam and a
2" narrowed one.  cutting the leafs 2" inches definately is going to have some effect
on the spring rate, I just am curious how much?
 the other thought is putting a 7/8 or 3/4 sway bar on a stock beam effect is much different that putting
it on a narrowed beam.
 has anyone ever figured out the handling effect of a narrowed beam and sway bar to a stock width other than the
narrower track?