That clapping may not be valves alone. The inejctors on these cars are known to click loudly as they age, which is not a big deal as you can replace them with ford mustang injectors.
The clutch more than likely the slave or master is going bad. Did it feel squishy or hard at all? A short shift kit wont affect the clutch pedal at all, it only affects the selector rod. Did he give you a brand? UUC, z3 shifter, Blondie etc?
How did you like the sport seats?

Dan [/B][/QUOTE]