Clutch Pedal Doesn't Snap Back

I have a hydraulic release bearing in my '71 Duster with 833 trans. The release bearing similar to the blue Hydramax that American Powertrain sells with their kits. I have the braided lines, 3/4" bore master cylinder. My issue is, the clutch pedal doesn't "snap back", preventing me from doing power shifts or quick shifts you'd want when racing. Doesn't slip or grind any gears. I had the clutch disc & pressure plate made locally. Works well otherwise. I'm lost as to what it could be. Overcenter spring has been removed. Any ideas?