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

Bumpers and brackets are probably together less than 50 pounds.
1/2 a tenth, maybe.
I guess i long ago gave up chasing world speed records. I have gotten back to good looks, and willing to give up a tenth, tenth and a half to not have to sit my hood on the roof, or have painted bumpers instead of nice shiny chrome ones.
Opening up the hood the factory way is way worth it to me