These extended throttle shaft arms are cast in the original Eelco molds from the 50s. The shaft hole is 9/32" for the Stromberg and Holley 94s but can be used on the Rochester 2G if you run a 5/16" drill through the shaft hole. The top hole is 3/16" and fits all of our linkage parts with the 3/16" shaft. Comes as-cast with hardware. Cast in original Eelco molds. Fits: Holley 94 Stromberg 97 Rochester 2G.