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the right amount of torque. they are all flares at the carbs.

yep, that's about right. the easiest way i have found is to keep the 2 brass connectors just a little loose on all the lines, mount up the 3 carb ones to snug and wiggle each line as you snug nut. once all 3 are snugged up, then snug up the 2 connectors. once every thing is snug go ahead and tighten them all up. works for me every time!