Knock Sensors Missing?? (Did I buy a bad motor??)

[TRPLXL2]

Alright I'm all worked up right now, because I spent all the money I saved up for this LS1 out of a 2000 Camaro and I think I bought a dud! I pulled the intake today as I am going to paint it to match my truck, when I pulled it I find two holes where the knock sensors should be only to find nothing there!! No harness no sensors no nothing, I called him back and asked him about this and he said they broke when he pulled the motor which sounds like total BS.

Could the motor have been damaged driving without knock sensors, It has 120,000 miles on it and I did research this forum for answers but the more I read the more worried I got. If I buy the harness and sensors, will the motor run okay or is the damage already done? Or can you have the engine tuned to run without them, I just hate to continue with this motor if it's no good.. Please help........AMY
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