Hello I would like to help you with this.

I'm not really sure what you're looking for from your question but I think you need their rear shock for the bumper. Or the rear bumper.

I think you would be able to find what you're looking for here.

http://www.ebay.com/sch/i.html?_nkw=1977+cutlass+rear+bumper

If not please describe better what you need or upload a picture of what you need so I can better understand how to help you.

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Thank you,

Carl,