53fivewindow, just went out and took a good look at the old mounting place, it looks like the cap would fit with or without the flanger. i would suggest you try it without flanging. the instruction say it would work on a slightly crowned panel. RON
Ron, The Computer Greek I love therefore I am. 1954 3100 Chevy truck In the Gallery 2017 Buick Encore See more pix 1960 MGA Roadster Sold 7/18/2017