Bumper Help

I have a 1973 Dart Sport.I have a bumper that came with it,BUT,no mounting brackets (OR)
Mine has a massive beam on the back of the bumper..No place for normal brackets.Does this call for Shock style?Can it be changed to Bracket style?
I cannot get a straight answer from anyone.
HELP. Thanks,Sam in N/E Ohio

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this pic is on my 75 duster. I have a set from a Dart (longer)if interested, but shipping wont be cheap...about 25pounds.

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