If you want a serious rear bumper and hitch, I made mine out of 4 inch channel iron and used a universal step tailgate hitch with receive. Total cost about $100. If you want original, they are not very strong.

1954 Chevy Half-Ton
In the Stovebolt Gallery
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1958 Chevy 1/2-Ton Stepside
In the Stovebolt Gallery
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"Time's fun when you're having flies." ~~ OLD FROG