Any parts store can get you an inexpensive 67 Impala drum/drum non-power master. Likewise, any competent shop can bend up a couple lines for you. Remember on this car, the FRONT port goes to the front drums. Not like on modern cars. Don't let them tell you the front goes to the rears. It doesn't. If you want pre-bent lines and a distribution block, they come pre-made.
This one's for my 65, I happened to have it bookmarked.
Two doors, four doors, wagons, and ragtops.