This is a New HEH Toploader Transmission Input Shaft with 23 teeth, 1-1/16" spline and 8-15/16" OAL HEH Toploader Transmission Input Shaft 23 Teeth Gear, Close Ratio and fits the Small Block. Please Note: There are several inputs for the HEH depending on whether you have close ratio or wide ratio and small block versus big block. This is the input shaft the only fits the close ratio small block. If you need a different input please see our store or ask. WT296-16C You can identify this transmission by its iron case and 10 bolt steel topcover