I put a disc in backwards once at work when I was young and had that problem. It wouldn't disengage. I never made that mistake again. If it's not a stepped flywheel where the pressure plate mounting surface is a different height than the discs' surface, I would think that on a flat flywheel the pressure plate and disc would compress to the correct height no matter what flywheel it was. It would not matter if it was a redrilled flywheel, it's still a flat surface the same height. I just did the clutch on my daughter's Scion and it had a stepped flywheel. The machinist had to take the same amount he took off of the disc's surface off of the pressure plates' surface, two separate cuts. Too bad we don't know what the finger height measurement should be. If you have the old parts, always measure that stuff on before you disassemble them. Never-ever-ever turn in parts for cores until the job is done. You need them for comparison when things go wrong. Always lay the pressure plates upside down next to each other to see that the machined surface is the same height. Same with the discs. Make sure the pilot bearing, throw-out bearings and clutch disc fit the tran's too before you try to slip the trans in.
