Good , early Small Block Chevy blocks are getting harder to find. We have in stock, rear main seal adapters that allow you to use your early (up to 88) two-piece rear main seal crank in a late model (88-up), one-piece rear main seal block ! Just $90.00 including hardware. Call or check out our website for more information . 918-855-8655 or hodgesenginesandperformance .