actually I can pick up the bare shortblock myself with alot of effort...it weighs about 200lb. I weighed the bare block and it weighs 135lb. The 6m crankshaft is 50lb, and the rods and pistons are about 20lb together. Also the head is about 60lb assembled. The w58 tranny is about 150lb i would say. SO from all that the engine, and tranny are about 450lb