Fittings and Sizes? - 1968 Dodge Dart Brake Lines

The 3/16 tube line fittings you need are not available in most auto part stores. Inline tube has them on their eBay site. Sizes are 9/16-20 color blue and 1/2-20 color violet. Go to eBay and search Inline tube #tn8 and Inline tube #tn09.