I pushed the clutch to the floor yesterday and the clutch released, but then the pedal went soft. When I looked under the truck there was fluid running out of the slave cylinder. It appears I had over traveled the slave cylinder and pushed it out. 
It is a brand new aisin clutch master cylinder and slave. What did I do wrong? It is mounted on my SBC the same as the old one was mounted.
Thanks,
Matt

It is a brand new aisin clutch master cylinder and slave. What did I do wrong? It is mounted on my SBC the same as the old one was mounted.
Thanks,
Matt