I have a set of clutch head bits, but have also ended up using a regular flat screwdriver to remove some clutch head bolts when the bits didn't have a snug fit and was worried about rounding them out.

1949 Chevy 3100 (In the family since new)
1955.5 Chevy 3100 - in the DITY Gallery - (Dad's truck)
1955 Chevy 6500 - in Big Bolts - (Possible parts truck?)
1958 Chevy 3800 w/9 ft bed - in Project Journals - (Current project)
1959 Chevy Spartan 10400 - in Big Bolts