I知 rebuilding an engine in an ITB Rabbit. After overheating the oil and loosing oil pressure the engine started to knock. After tear down I found #1 & #3 rod bearings were the problem. I noticed that the rods on those two cylinders were discolored from the heat. Otherwise they look fine. I know I should just pitch them but I知 on a pretty tight budget. Can they be used without great risk to failing later?