Rotisserie rear mount e-Body

Is it okay to mount a rotisserie using the bumper bracket holes on a 70 Challenger? All I would need to do is drill holes in the supplied valance bracket that came with the Rotisserie. The provided leaf spring support bracket would require fabrication. Please post pictures of your rear attachment solutions. Maybe you have an easy way and I'm just over thinking this. Plus, I don't want to damage anything in my process. Thanks

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Rotisserie rear mount e-Body
Author: DHRKRider