wheel cyl. fitting

well, every time i get close to getting every thing together for my 10'' drum conversion, some other problem crops up. now its the brake line. the line was broke off even with the line nut on the wheel cyl. all the new lines i find has an inverted flare on each end, and the wheel cyl. has a different mating surface. in looking online, the closest thing i can find to discribe it is what they call a bubble flare. has anyone had any experience with these cyl? i dont know about where you all are at, but down here in the south its nearly impossible to find anybody that knows jack about anything older than 10 years old. please tell me something so i can get my car back on the road. thanks, dave. oh ya, this is on a 72 dart.