'Shelby drop' - relocating the upper control arm attach point is a tried-and-true handling technique. Do a search here on MC.net
Larger front - and add a rear sway bar. Addco is probably the easiest to find.
While doing the above, make sure to use poly sway bar bushings and end link bushings (part of Addco kit)
Stiffer and lowering springs, front and rear (Espo will make these however you want)
Shock tower and 'monte carlo' bar bracing - do NOT use the bars with a u-bend in the middle! I like a combo of
these shock tower braces with
this add-on montecarlo bar kit. Very neat installation that doesn't get in the way of changing spark plugs! Available with quick-disconnect pins, too!
heavy-duty shocks of your choice. Some people prefer KYB Gas-a-justs, others like Billsteins.