okay so here is what i did. first i removed the spring on the clutch pedal assembly. the wilwood 7/8" master has an internal return spring. now there is a half-moon hole there that needs to be filled. the pedal is aluminium. i made a spacer on the lathe of the right width to fit into the u-hook. i welded this one to the oem pedal. make sure to remove the plastic bushings, you don't want those melting. the first picture shows the end result of this work.
next you have to make a bracket that welds onto the stock pedal assembly. the second and third picture give an idea how the master is mounted.
i also welded 3/4" spacers to space the pedal assembly away from the firewall. i don't have a picture of this.
the end result is no god-damn clutch master banging the right side head and the pedal at the right height. the last two pictures show this.
with this configuration, you can run a full 1.1" stroke at 7/8" bore. it's a lot of fab work, but i think it's the best way to go for proper clutch disengagement.