[ZDan]

Regarding frequencies, for each corner, you can use:
fn = [sqrt(wheel rate/sprung mass)]/2pi
Easiest if you just use metric units: wheel rate in Newtons/meter, mass in kilograms

Wheel rate is the spring rate divided by the *square* of the motion ratio.

On my FD, one corner = ~3000lb/4 = 750 lb
Unsprung mass per corner ~50 lb.
sprung mass per corner ~750-50 = 700 lb, divide by 2.205 lb/kg = 317 kg
11kgf/mm springs, multiply by 9.81N/kgf = 108 N/mm = 108,000 N/m
motion ratio ~1.6 front, so wheel rate = 108,000 N/m / 1.6^2 = 42,188 N/m
motion ratio ~1.4 rear, wheel rate = 108,000 N/m / 1.4^2 = 55,102 N/m

fn front = sqrt(42,188N/m / 317kg)/2pi = 1.8 Hz
fn rear = sqrt(55,102N/m / 317kg)/2pi = 2.1 Hz

~2Hz is a pretty damn stiff street ride, pretty damn soft track ride, a decent-enough compromise...