Rear Side Marker location differences AMD vs Good Mark vs factory?

[69RRMFF]

I have installed a LH and RH quarter panels on my 69 RR. While measuring for fitment I found that the RH (AMD= 2”) is different than the LH (Good Mark= 2 1/2”) where the reflector openings are concerned (see pic’s). I don’t have access to an original factory quarter panel so which one is correct?