Good luck with those POS 1/4's, Tav. They were made by Goodmark. When I bought mine 7 years ago for my 73, that was all that was available.
After the 1/4's were installed & painted, I discovered that the gas cap and markers wouldn't fit...
Since my markers fit flush, we were able to elongate the marker stud holes to mount them correctly. Your markers are recessed, so that will be an issue.
As for your gas cap, GOOD LUCK. The flush cap or the flip-top AIN'T GONNA FIT. I had to go to my buddy's Mopar boneyard and have him cut an original gas cap opening from a rusty 1/4. I cut out the re-pop, POS, mis-shaped opening and slid the original opening in on the backside of the 1/4, and then bolted my filler neck and flip-top capo in place. NOT exactly OE, but no one has ever noticed...
Since the car was already painted, sometimes you gotta do what you gotta do...
Also, I think that the bottoms of the 1/4's curve in too much. My original rear valance was too long to fit the opening between the lower 1/4's...
I had to pie-cut and re-weld the valance to make it fit. Again, no one has ever noticed, but it pissed me off...