I have an 11 inch clutch in mine. It came from a 1954 Corvette that sadly had been a total loss. As Gord said, find out what you have first. The flywheel will tell the story. 10.5" was common and 11" is out there...was used in bus, heavy truck and was also in some early Corvettes (which is where mine came from). I used a 10.5" with a 1956 235 for years.
