is it safe to use 90/10 copper nickel for brake lines for my hb truck, 1989 2wd 4 cyl (3/16"o.d., .373"i.d., .028" thick wall? i'd like to hear from those with experience. are amazon and ebay safe in so far as getting plain copper instead of advertised copper nickle tubing? i'm wary of ebay especially and china sources, even though it's probably where most part sellers gets theirs. thanks all.