Hydraulic setup uses much less space, is less complicated and works just as good if not better than a mechanical system IMHO. (Provided you don't use a hydraulic throw out bearing.... they are prone to fail and require trans removal to fix.)
Here's the simple setup I use on the hemi in my Deuce, a '61 Chevy truck slave cylinder. Easy to adjust and uses the stock master cylinder with a period correct Anson pedal system.
Uses this master cylinder.
"When buying a used car, punch the buttons on the radio. If all the stations are rock and roll, there's a good chance the transmission is shot." - Larry Lujack