Weight difference between glass and steel bumpers on 71 duster/scamp

Would be interesting to see how much I can save by pulling out my heater box, hoses, heater core and controls for a non a/c setup...Don't want to bother if its not going to net me atleast 25lbs, but if its more than that im thinking im going to remove it.

That is def. the wrong way to look at it. My all steel, all cast iron motor, full stock interior, full exhaust, roll bar, subframe connectored 71 Duster is much lighter than my 71 Scamp that has an aluminum intake, headers, short exhaust, gutted interior and fiberglass hood and front and rear bumpers. It's all about looking at the whole picture and getting alittle out of everything....