If your front bumper assembly has the
"shock absorber" bumper brackets, like the rear, you can save a lot of weight by switching to '73 or early '74 bumpers, which have
standard brackets holding them to the frame. But you will have to do some fabrication to attach the older brackets to the frame. The different bracket style attaches to the frame differently. Naturally, fiberglass would be much lighter.
The "shock absorber" bumper brackets bolt to VERY heavy reinforcements inside the bumper, like the photos show. The bumper bolt pattern is different between the style of bumper brackets used, but could possibly be welded to the regular brackets instead of using some of the carriage bolts.
Dart Sports started in 1973, but the
rear bumpers are totally different. Earlier Swinger bumper assemblies, maybe even Valiant/Scamp, may fit, but with fabrication like the fronts to the frame. But the rear weight is where it will do the most good by helping with traction!
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1976 only - Dodge Dart Lite - (Sport only) They are hard enough to find here in the U.S., so it would be unlikely to find one in Australia. But these cars had aluminum bracing on the underside of the hood, which saved about 12-15 lbs, which required lighter hood springs. Those inside bumper reinforcements were also made out of aluminum saving a LOT more weight.
