Here's a little tip on the copper washers. I recently bought a 66 Mustang restomod. I've been trying to fix a rear brake (1984 Lincoln Mark VII rear discs) issue. When I replaced the old brake hoses I found that the new ones leaked at the banjo fitting (came with new washers). I bought another set of washers (Autozone) and the sumbitches still leaked. The solution was to anneal the washers, after which they sealed perfectly. If you don't know what that is (I didn't) check youtube.