8 good used Jesel shaft rocker arms from top Nascar team. 4 .080 right offset and 4 .080 left offset. These are 2.10 ratio, 1.850 pivot length rockers, .562 shaft diameter, 1.575 bolt hole centers on shaft. The part # is ECDL10 & ECDR10, these were used in a Chevy SB2.2 engine.