Hey Dean, your post got me curious enough to do a bit of research online. Found this, and maybe it will help you>
Restoring and tweaking 4-piston disc brakes
Snip from the article>
"The Bendix setup, as mentioned above, doesn't use a crossover tube, but it does use a small tube to connect the caliper to the flexible hose, unlike the K-H setup where the hose screws directly into the caliper. This length of tubing is, for some unknown reason, not flared with the usual double flare. Instead, it uses an oddball ISO bubble flare. If the tubing becomes damaged, or is heavily corroded, a new one can be had from Year One as catalog number A0717 (a pair.)"