Fibreglass Bumper Brackets

I just got done taking my front bumper of my 73 dart sport and weighed it...75lbs with bumperetts and 68 lbs with out! I am putting on an AAR fiberglass bumperthat weighs about 5 lbs (painted) then I took my brackets ( just the outersides ) and took a plasma cutter and took them down to a skeleton of there former selfs. The brackets combined weigh in at 4.2 lbs. So with bumper bolts, license plate, bumper and brackets I am putting about 10 lbs back on! Thats a total of 65 lbs off the beak of my wreck! Also I took the inner brace ( crash bar ) from behind the rear bumper off and that weighed 20 lbs. and rear bumperettes were another 7 lbs!