MuuMuu101's 68 Dart, A Learning Process...
When I put that exact same flip top cap on my 68, I used the two holes that are in line with eachother, and drilled two more to the same distances as the holes already in the fuel neck, then transfered the holes to the adapter. You wind up with quite a few holes in the cap base, but it works good.
http://s43.photobucket.com/user/serj22/media/CAM01944_zps8f00605f.jpg.html
I just drew an "X" on the adapter where the screws were on the fill neck, then measured the distances from center, and it worked in the first try for me.
http://s43.photobucket.com/user/serj22/media/CAM01946_zpsbbd572f2.jpg.html
I just used 4 longer metal screws through the cap base, adapter, body panel, and fuel neck, and it doesn't raise the cap or affect anything at all. Been on there 6 months. I do advise using a sealer of some kind between the adapter and body, first time i filled up without sealing it at the pump I did not notice I was draining a nice waterfall of gas down the side of the car.
When I put that exact same flip top cap on my 68, I used the two holes that are in line with eachother, and drilled two more to the same distances as the holes already in the fuel neck, then transfered the holes to the adapter. You wind up with quite a few holes in the cap base, but it works good.
http://s43.photobucket.com/user/serj22/media/CAM01944_zps8f00605f.jpg.html
I just drew an "X" on the adapter where the screws were on the fill neck, then measured the distances from center, and it worked in the first try for me.
http://s43.photobucket.com/user/serj22/media/CAM01946_zpsbbd572f2.jpg.html
I just used 4 longer metal screws through the cap base, adapter, body panel, and fuel neck, and it doesn't raise the cap or affect anything at all. Been on there 6 months. I do advise using a sealer of some kind between the adapter and body, first time i filled up without sealing it at the pump I did not notice I was draining a nice waterfall of gas down the side of the car.