I have a 1957 CJ3, dead in the garage for 24 years now. The brake fluid all leaked out. I have an entire kit for new original brakes I'd like to install. My question is - can I just flush the heck out of the lines and keep the originals? Or is there the chance that gunk in the lines will mess up my new wheel cylinders? I tried looking this up on the forum but keep getting "database error" all the time.