How much does a 1974 duster weigh?

After I get it weighed, is there a kit to remove the bumper shocks, and mount a newer bumper on the front and rear, To reduce the weight. Any help would be greatly appreciate.
I don't know about a kit..... but we have a fiberglass place we can drive to, and inspect their parts before purchase, and avoid crating and shipping charges. Unlimited Is in Hesperia. Most here don't have that advantage. (I guess I consider that local, since I go thru there at least twice/month)
I think I would put a glass bumper on it, at least on the front.
Unfortunately, unlimited doesn't sell anything I need for my cars that I would buy glass for.