I've found a slightly used Muzzy lowering kit I am thinking of getting. They fit all model years of the C14?
Yes
I'm 6'4'', yes, but till I got this bike, had only rode cruisers and I would like a little lower center of gravity for my riding style.
Standing height is irrelevant on a bike... only the individual measurements (torso length, leg length, arm length) when discussing various aspects (comfort, windscreen, lowering, etc). Although with that type of height, it is likely you have way long enough legs to not be required to lower the bike (unless you are way, way more out of proportion than even I am).
Do you have to get a shorter kickstand with lowering, or is it just recommended?
If using the fixed 1" and lowered correctly (front and back), it is required (unless you don't mind the bike falling over)
http://www.zggtr.org/index.php?topic=260