New 63 dart windshield gasket?
if RockAuto is selling their products, they can't be all that bad
LOLROFL what on earth gives you that idea? RockAuto offers a lot of good quality parts, but they happily offer a TON of garbage—and you can't avoid it just by shopping on name brand, as I found out the hard way (see
here).
Goodmark is a resto parts vendor better known in the Chevy world. Quality of their stuff ranges from "pretty decent" to "Trinkets made in China of mulched-up political dissidents and unwanted girl-children". Two times ago that I needed a windshield gasket, I bought one that cost about $35. It didn't fit very well to begin with, it leaked, and in less than a year it began shrinking, cracking, and "bleeding" black stuff along the paths water ran off it. Then I had to cough up the money I should've spent in the first place, and that gasket was obviously and durably much better.
Reliable sources for the '63-'66 A-body windshield gasket include
Metro Molded Parts and
Steele Rubber. It's going to cost you (much) more than $35, but on the other hand it'll actually seal the water and wind out, seal the windshield in, and last a reasonably long time.
(Parts sources in general,
here)
