73 to 70 rear bumper swap

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    Author Topic: 73 to 70 rear bumper swap  (Read 978 times)

    Offline 19Cha11enger73

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    73 to 70 rear bumper swap
    « on: April 10, 2018 - 11:57:38 AM »
    Good morning forums!

    I’m currently working on a 73 Challenger.  The rear bumper had been damaged at some point in the cars life so I wanted to replace it. The plan is to swap the factory rear bumper with the 1970 bumper.

    Here’s my roadblock. The factory bumper I own has an inner support bracket(correct term?). This is also bent along with the bumper itself.  I just received the 70 bumper and 70 rear brackets yesterday. From my google results I am having trouble finding any solid answer. Is the inner support bracket from a 73 compatible with the 70 style bumper? If not, does anyone know of a source to find reproductions?

    Thanks in advance!
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    Offline 70chall440

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    Re: 73 to 70 rear bumper swap
    « Reply #1 on: April 10, 2018 - 01:38:20 PM »
    I cannot offer a "solid" answer per se, but I do not believe the inner brace is transferable without modifying it. Most people discard the brace (me included). The issue is that the holes don't line up between the years.
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    Current Mopar
    70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
    05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
    Past Mopars
    9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

    Offline redo1973

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    Re: 73 to 70 rear bumper swap
    « Reply #2 on: April 10, 2018 - 09:51:46 PM »
    I had the same situation and tried to fit that "frame" but the curves and holes were off.  I decide to omit it and went with a 1972 bumper.  no apparent issues.
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    Offline jimynick

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    • Posts: 4512
    Re: 73 to 70 rear bumper swap
    « Reply #3 on: April 10, 2018 - 11:50:51 PM »
    You also need the 72 brackets as the 73's are deeper to effect the "stand-off" required by the government in 73. The re-bar will not fit the earlier blades and is a 73-4 specific deal. You'll be able to lose the plastic fillers as well as tighten the bmpr/quarter gaps. Good luck  :cheers:
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