Help! More brake questions

[Kisner]

Just when I thought I had everything figured out and bought "all" new components for my entire brake system, I run into another roadblock. My 68 coupe came originally with standard drum brakes. When I received my new front brake lines yesterday and were comparing them with my old, they weren't close to matching (they manufactured new ones from the distribution block to the rubber hoses). To my ultimate horror (stupidity for never checking), the previous owner switched the front brakes from manual drum to disc. Now that's great for braking power, however, I know the original, optional power disc brakes for the 68 came with a power brake booster and proportioning valve. The previous owner didn't purchase these and left the old manual drum master cylinder and original distribution box. Is there any way to make these brakes work as non-power disc? I know some of the earlier Mustangs had non-power disc. Don't really have the $169 for a new pressure differential/proportioning valve and $200 or so bucks for a new booster.

Also, do I need to return my new drum master cylinder and exchange it for a disc master cylinder? Not sure if the master cylinder lines for the disc will still line up with my distribution block?