Hmm... I hadn't considered that. Thanks for the tip.
But if the system is full of fluid with no air, how could it run back down the 3" slope into the master?

I routed the braided line up to a small bracket secured to the firewall, where a bulkhead fitting provides a connection to the short "humped" line going from there to the master.
It does sound like replacing the (upper) line with a piece of steel brake line (that can make tighter bends) is the first thing to try. Then, of course, I have to buy an adapter to go from #4 AN to a 3/8-24 inverted flare... or maybe just run hardline all the way down! The slave doesn't move since one end is fastened to the torsion bar crossmember bolts.

Also I don't have a pressure bleeder. Considering the Motive Power 0103 which fits my brake master, but also need to find a cap that fits the Wilwood clutch master...