ROLLER ROCKER ARMS kit 1.6 3/8 inch 16 CNC Stainless Steel SHAFT Mount Stainless Steel ROLLER ROCKER ARMS Shaft Mount kit for Chevy SB V8 1.6 Ratio 3/8", 16 CNC Stainless Steel SHAFT Mount , No Offset For the SBC 283, 327, 350, 383 & 400