tri carb help

[kip younger]

I'm putting three deuces (rochesters) on a chevy 350, what size gas lines run into the individual carbs? I want to make them out of metal, possibly brake lines, but don't know what size they should be. And, when I get around to putting everything back together, and start to set the carbs, at what rpm do I set it up, so the front and rear carbs start to be activated? Thanks much for the help!!!!! kbyounger