stock front shocks

yeah there is an adjustable ring on the bottom of the spring section of the shock assembly. there are 5 notches in it at different heights. take a pipe wrench( or a rubber strap wrench if you have pretty shocks) and turn the ring. the settings will look like a set of stairs if u will, the softest setting is at the top of the stairs.
 
get yourself some shee shocks , that'll help a little. or try to get some good aftermarket shocks and get them revalved for your wieght.