Ford Small Block Block.
Fits: 302, 351W
Ford Small Block. 3/8" and .006 Oversized.
Ford / GM Small Block. 7/16" Base & 3/8" Top
Ford / GM Small Block Rocker Arm Nut - 3/8"
GM / Ford 7/16" Rocker Arm Nut - Big Block
Small Block Ford Rocker Arm Ball - Grooved