https://www.ebay.com/itm/360424582635 this is what the factory used . but Russ did it a way it will never leak these will dry out and will leak.After replacing partial quarters, I'm wondering how well the factor seam fit.
I recall sealant on the inboard area butting the trunk gutters.
But what about out board.
Please take a look at your cars and see if the factory used sealant on the outboard sides?
Curious.
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That's what I remember on disassemble .Below is a picture of an original paint 69 A12 RR at the tail light bezel. I hope this helps.
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If full quarters were available when I tore into it, I would have spent 1300 and gotten them.Did full quarters on this car. Just too much to be done so put on the hole one. Too seam in a patch panel thought was a lot more work than in stalling full quarter. Had to replace wheel tub outer. Need the skin off and roof to get the inner frame and some structure replaced that was gone. Needed to get to all the outer frame to clean and prime as well as paint with bed liner. Wish you the best of luck on your restore. These old cars are a challenge if they are as rusted as mine was.