I’ve owned my 68 b-body Charger for over 35 years now, and while it may not be a survivor or 100% original, it has always had these rubber isolators between the radiator lower tank and lower support as long as i’ve owned it. Are these original pieces? They fit perfectly in the factory holes and seem to be for that purpose. Can anyone shed some light. I guess they could have been added by previous owner, but i doubt it.