It is a "Governor" as Fred said. It's used normally on Big Bolt engines to control engine over-speed conditions. The side plate (flat semi-oval plate attached with screws) under your finger tips probably is stamped CHEVOLET VARI-SPEED. See the attached pic below. There are probably other makes/manufacturers, but that's the one I am familiar with.
Last edited by Peggy M; 05/30/202411:47 PM.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
