need brake suggestion

I have tried 7/8, 1-1/32 and 1-1/8 in the same car with the same brakes? 68 cuda with 73-75 front disc's and 10 X 2-1/2 rear drums.

1-1/8 was too hard a pedal.

Currently 1-1/32 old Direct Connection alumunum. And it is pretty firm bordering on too firm. But a 110 lb female friends drove my car and she had no problem. (But she likes to go not stop)

IMO, I liked the 7/8 bore best. Order a 73-75 power disc brake MC but run it manually to get it. (Cheap at any parts store)