Manual disc brakes vs power disc brakes questions

Not sure what the pedal ratio is. I imagine it would be the same for all A body cars from 67 to 76.

I did put my power booster with support brackets on a bathroom scale and got 11 lbs. The old iron master cylinder added another 10 lbs to it. If the new master weighs in at about 2 lbs then i got a 19 lb savings, and an uncluttered firewall.

Now i just gotta figure which MC i need that will work with my 2.75" calipers. 72bluNblu chart shows a 1.03" bore master for use with power brakes and 2.75" piston calipers on B-J-R-W car lines, but shows a 1.03 bore piston MC on the V-L car line with 2.60 piston calipers with manual brakes. Now if we can find the pedal ratio of these different car lines, and compare that to the A body pedal ratio, i'd have a definitive answer.