Firt thing I did to my 58 GMC was to fix brakes and make sure it will stop before doing anything else. I pulled rubber lines and wheel cyclinders and took them to napa and they matched everything up for me. Even though they aren't made here in the us you can get the proper size at napa. It's also cheaper because you're not paying shipping.
Larryw


58 gmc 100 with 350 sbc