Thanks for checking the manual Rick!
The master cyl info is not in the 67 and 71 GM manuals, but it is in the 68-70 Chevrolet, Pontiac, and Buick manuals (except missing in the 70 Chevy manuals).
Someone will have the Olds manuals to check.
I haven't seen the info in a Delco Moraine catalog - did they print a master cylinder catalog? This is one for the boosters. The parts manuals are poor sources for this type of information.
BE has also been listed as 70+ full-size and I think it had many applications in the early 70's.