Since the original donor vehicle had an automatic transmission, I had to purchase a new clutch disk. These are surprisingly hard to find for a PT Cruiser. Most parts dealers only want to sell an entire clutch along with the disk. It's understandable why - the effort involved in removing the transmission from the vehicle is so great that the added cost of replacing the entire clutch would be worthwhile. Not so any longer. We've had the motor and tranny in and out more times than I care to remember during the engine mount fit checks.
The clutch disk was intended for a Dodge Neon, which has the same transmission as the PT Cruiser.