I have a 1966 Dodge Coronet Deluxe two door sedan 6-cylinder 3 speed on the column that I have converted into a 440 with a NP 833 O.D. 4 speed and Dana 60 rear end and converted the master cylinder to a modern type with two reservoirs for the disc brakes conversion I put on the front end. I added a Prop valve, but I didn't touch the rear brake line to the rear end.
I can't get a picture of it now, but I may be able to take one later this week or next week