Ok, if you can source them all the power to you! I replaced every line on my truck for $44 from off the shelf at autozone, I rented one of their brake line benders just to get nicer curves. I didn't have to cut or flare any, they were all just bolt in(after I bent them of course) I also sourced new stainless lines from RTE they are 100mm and cost $100. The one that you are talkin about is 40" long and fits perfectly without any modifications, I would just take your old ones in to make sure you can match them up. Good my man!
"Someone once told me not to bite off more than I can chew, I told them I'd rather choke on greatness than nibble on mediocrity!!!"