You can buy a 67 drum/drum master at O'reillys for very little. Use it till you are ready to convert. Throw the drum/drum master in the junk, put on a front disc/rear drum master--If manual brakes- The MC 36440 will work great.I should probably clarify: My current master cylinder leaks and i want upgrade to front discs soon. Now my question: Can i use this master cylinder with my drums until i swap over to discs in a few months? I don't plan to keep it with drums. I know that doesn't make sense.
But i think i will just buy a cheap 4 wheel drum cylinder for 30$ as a temporary solution until i convert to discs.
If you buy a 36440 now with drum/drum, you will need to put in a 10# residual for the front drums.