Universal aluminum brake master cylinder

Merry Christmas, I was looking at the universal master cylinder and they have a 1 1/32 and a 1 1/8 bore does it make a difference which one to get, going in a 74 duster 360 street car? Thanks
I got an aluminum MC from Dr Diff for my 72 Challenger with manual brakes front disc/rear drum. Replaced the stock looking MC. Pedal height is higher, but much improved braking.

Mopar Aluminum Master Cylinder Kit