Now that I'm remembering, after looking at the pics, you might do well going up and out. Moving the master cyl might be in order and the smartest. Dartin's are on an RB with -1's so you can get a visual of what a gang of tubes may look like. The worst flowing will be #2 by far. Orient them firing into the collector in a circle too. Should be easier to fab putting the collector above the mid-level body line...