Hi. A brake line with the disc brakes gets a 2# check, drum brakes get a 10# check. I think you only need these if the mc is lower than the calipers and wheel cyls. Check out this website, http://www.seattlestreetrods.com/index.htm
, and click on the links by part. Virtually all the brake component links are there. Lots of good info in the sites.