Get the parts for a '67 model. It fits reasonably well. Get a master cylinder to match up with the type of brakes you are going to use and reuse your existing pedal push rod. If this is also a conversion from drum to disc, or, manual to power, you'll need some other parts to go with it, such as a proportioning valve, booster, brackets, etc.
100% agree. I'll add just a bit.
With a tubing bender and a double flare tool, you can make your own lines, with the caveat that the fittings on the lines you get in parts stores these days don't have the correct threads (unless that's changed since the last time I bought any). But the correct fittings are available. Ehrenberg, for one, sells them on ebay. A roll of bare line will give you all the line you'll need and more. However, the kit is easier, albeit more expensive. I used a 69 Barracuda kit in my 63 Valiant, just because I already had it. I had to hand bend the firewall line from the right front brake to splitter just a small amount to fit, even though the Valiant engine compartment is narrower than a 69 Cuda's. The M/C lines fit perfectly as is. Can't remember about the left front brake line, whether I used the 69 or just made a new line. As for the splitter, you can get a fitting that does just that, or you can swap in a later combination valve, which is what I did. They are available new.
On my 65 Barracuda, I made the lines myself, because I had to re-route them to clear the TTI headers.
One thing, the splitter (down on the frame) is in different locations in different years. If necessary, they can be moved, or, again, if you have a double flare tool, it's easy to shorten a line if you need to, and minor bending can be done by hand - you don't even need a tubing bender.
Finally, the little rubber lock rings that go onto the pedal push rod where it goes into the m/c are available new. I think I got mine off ebay, probably from Ehrenberg. I'm sure there are other sources.
