If the starter of this thread thinks he can just "change the bearings out" and that will fix his knock then he really hasen't the faintest clue. He'd also need a crank, oil pump, possibly a rod or two, and maybe even a block(if he spun a main bearing badly) basically, there is much more involved in fixing a motor with a knock, than just putting new bearings in. If you just swap the bearings out, it'll run for 30sec before it starts knocking again....