I have done lines on a '98 voyager minivan, and the back half of a '98 Neon (had to flare the factory line, NAPA has a neat tool to do double flare on 3/16 line, it is about $29.99 and does ok on the factory line) Chrysler likes to use different sizes on the master cyl. maybe so they could not be mixed on the assembly line? the line size was the same (3/16) but one of the threaded parts was 7/16-20 if i remember, and one was I think 1/2-20. You definitely want to use the "NI-Copp" brake line from advance auto or autozone Like part no cn-372 72 inch length pre flared with 3/8 fittings, also in other lengths, and in coils. This material is much easier to double flare like brake lines should be. And it wont rust. Cut one end off and put the correct size fitting on and re-flare. I am about to replace lines I did about 6 years ago. I am in the salt belt!
two sites to look at are: