Chevy / GMC SM465 4 speed Transmission Bearing Kit, BK129WS 1- Chevy SM465 Speed Transmission Bearing Kit with synchronizer rings Part number is BK129WSThis kit is used for the transmissions that have the thin input shaft bearing which is 17 28mm thick If your front bearing is thicker look at our the listings for part number BK129LWSFits 1968 to 1987 GM 3/4 and 1 Ton Pickups with 17 28mm front bearingFree Lower 48 States ShippingThis kit is the same kit we use in our own rebuild department