GULFPORTZ28

My 02 z28 has a pretty violent clunk/bang when in first gear and you push the clutch all the way to floor quickly

Doesnt do it any other time

Didnt notice it until I took it to dragstrip wednesday.

Also after a burnout, (slip the clutch get the tires spinning shortly and stab the clutch back in/off the gas) not john force, or high rpm clutch dumps, ive noticed the rpm takes a moment to come back down even though the clutch is fully depressed

Also having a slight chattering problem when clutch is being engaged, without throttle

Car has a new flywheel, throwout bearing, pilot bearing, tick adjustable master cylinder and tick stage 2 clutch, rebuilt trans, all done by previous owner 1500 miles ago

Clutch only engages with the last few inches of pedal and doesnt have much "range"

Hoping a lil adjustment to the master cylinder is all thats needed, and I can resolve this without removing trans, as the exhaust is welded and its a bitch, or at worst something that can be fixed without dropping trans (trans mount etc.)

Going to jack it up tommorrow and put it on stands and check it out

If i have to pull trans, any ideas ?