i have just bent and flared new brake lines for my 66. im about to tighten up and bleed my system. how tight should i tighten up my fittings. i dont wanna go too tight and break one and i dont want to have a leak

 

Only use a small open end wrench and just use your fingers. You can tell when it hits bottom and won't tighten any further without forcing it. They sometimes even squeak just a tad. If they do, then stop.