Big Block Chevy 396 Short Block Engine, unassembled. 2 block mains; '71 date stamp. Block (casting #3969854), crankshaft (#3904815), oil pump, dampener, pistons and rods, and flywheel (no pan). Also comes with Crane Fireball II Hydraulic Tappet Cam (302H). Lift int 544/544 exh. 302 dur, 228 @ 50. 112 degree lobe sep. 5 degree advance built in cam. I believe the pistons are Speed Pro L2240N, 0.60, S/P told me they are forged pistons with most likely 182 dome; compression will vary with head cc. I'm sure one would refresh (rings, bearings, etc.) this motor, but when I took it out there were no issues. I replaced this motor with a 468ci roller motor.