Where did you get your front disc conversion?
I bought a whole 74 valiant 4 door and drove it home for 150. Had the BB disks and drums and everything and it all worked fine.
I later drove it out to friends wrecking yard and we put it up on the forklift and stripped everything we wanted and left em the title. They later sold the engine for 275, everybody wins.
I got everything needed, lines and all, only thing we left was the master cylinder has a rebuilt should be easy to find.