1965 Barracuda ext trim and more

hey im working on a rebuild and we are to the pint of putting all the exterior chrom back on and i was wondering if i should use any type of foam padding or any rubber strips for between the metaland the trim backsides and if so what yall using and any links or tips on re installing ext trim and i was also wondering about the tail lighghts are they done and sealed up one i get them mopunted back on car and plastic moulding against car is tight or is there any other proper ways im just wondering about the water proffing situation really

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