Clutch Problems, could use some suggestions.

Just replaced the clutch, pressure plate and throw out bearing on a '74 Duster, 3 spd on the floor. Prior to the replacement (the clutch was shot), the pedal came back up on it's own with no problems. Now I step on the clutch pedal, shifts into gear about a 1/4 of the way down, but when I start to release it the gears grab hard, no sliding into gear like when the clutch was shot. (the best I can describe it) the pedal only comes up about 1/4 to a 1/2 of where it should rest. What's broken, or what did I do wrong. It's really Pi&%ing me off now.