going out on a limb....

ok. B-bodies want the help i needed. as some of you know, i bought Cliffs 78 cordoba. what im wanting to do is replace the shock absorber style bumper mounts with something solid that weighs less. push comes to shove, Cliff gave me the idea to drill a hole in them and drain the fluid. That however, wont shave as much weight as i would like. Anyone here able to help me out?