Throwout bearing pics below. New one (right) doesn't have a cam. Old one (left) does. What's the purpose of the cam, and is it ok not to have it? Came from Rock Auto. It's a National 614037 and seems a perfect match, just without cam.
Matthew 6:33
1952 Chevy 1/2-ton 3100 Late '55 235/SM420/torque tube 3.55 Dalton Highway survivor (using original 216) www.truckwithaheart.com