Brake booster came today (8" double diaphragm). It makes a big difference in clearance and mounting position. Just held it in place but it looks like a 9" would just fit too.
I'll put the brake lines on hold and get this mounted, and post some pictures. I will carefully position it so that a 9" can be swapped in. Since I have this one I'll use it first. That way when it's all done and I get around to doing a brake test with the truck at full 16,000 lbs gross, if it doesn't have as much Whoa as I want I can move up to the 9" dual.
Btw, found the rear flex line at O'Rileys when I picked up the roll of brake line.
