VIN is 18N466273, engine assembly date and code is VO702MO. The previous owner told me it had just 1,000 miles on a fresh rebuild with NOS TRW 3927177 pistons, GM cam and lifters with the "O" stamp. I believe it is still standard bore, but will pull the heads for a serious buyer. He told me it was super tight and ran beautifully. Final price reduction to move this thing...$2,750 firm for the long block (block, crank, pistons, rods, heads, timing cover, oil pan, balancer, cam and lifters. I can leave it together or tear it apart for inspection, whatever the purchaser wants. Local buyers only...will not ship. Thanks!