damn your pissed. when a motor is rod knocking it is like taking a hammer to the crank and rod. bends the rod and dents the crank. if you try and just replace the oil pump and bearings as soon as you turn over the motor you will ripp the bearings and rod knock again. i say completly rebuild the botoom end with new crank,rods and rings,bearings... it's not cheap but i would rebuild a motor than buy one for 2200 and not know how it was treated. happens enough that people know about it. they buy an sr20 swap it in with bolt ons and then start it and it has rod knock. better off to rebuild it..