welcome to the garage N. - you've found the right place for that particular problem - it's a standard old GM fastener called clutch head - most vendors have the screwdrivers/bits, including NAPA and Snap-on
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
