OK, I'm using the 3/4" brake/clutch combo unit and I'm not sure what to use for a slave. I have a nissan 3/4" slave cylinder that I'm going to try make work. It was only $12 at my local NAPA so I thought it would be worth a shot.
When the tranny was in my Midget I had the stock clutch MC and 1275 slave, and it was an easy pedal, but you had to but it all the way on the floor.