go to progressive suspesion.com and read about thier lowering kits.
you can lower it 2 inches with thier kit, it's completely adjustable via the upper space, and how many springs you put on the bottom.
and you could slide your tubes up in the clamps when you re-install them
i just put an 06 SuperGlide in the weeds:
http://www.v-twinforum.com/forums/dy...2003-dyna.html
edit: you said super, but you mean street.
i dunno how much you can push the tubes up without hitting something