disc/drum mc& booster on my 70

[andys70c10]

Ok another ? I pulled a power brake setup off a 71 or 72 C10, of course I am going to buy a new power booster, but for only $10 more I can get the whole booster & mc assy. from laps. My ? is will the later model mc & booster work with my all drum setup as I am not ready to upgrade to front discs yet? I have searched this & could not really find an answer. The part #s are diff. is the reason why I am asking. Of course I could just convince the guy it came off a '70 model & he probably wouldn't know the diff.