Rear Main Seal Adapter Alignment ToolSteelCadmium
May be used to convert one-piece rear main seal on 1986 and newer SB Chevy blocks to the old style, two-piece rear seal when installing an old style (pre '86) crank shaft into a newer style ('86-up) block. Billet aluminum adapters come complete with necessary hardware. Available alignment tool allows quick, easy adapter installation.
Brand: Allstar, Model: ALL26127