67 cuda FB progress UPDATE

My first thought was that it was a jack hold down spring but I never had one in my car so I'm not sure. It doesn't look the same as the one in this picture but there may have been variations.

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This one is shown in a Charger.

Thanks 67
My car didn't have a jack in it either. In fact, it didn't even have much of the trunk extensions left to put a jack on. L.O.L! I'm at a loss.
I'd hate to be one day driving down the road and find out it's to wind up the engine with.. L.O.L!!!!!