I found a 00 Legacy GT ej251 in a pick a part and pulled the engine, car harness, computer, and all applicable electronics to run the engine. I rolled the motor over with a ratchet in the yard and it felt alright. Upon closer inspection I have found that the exhaust valves are bent in three cylinders. So I must ask the experts. What would the est be for cost to fix or value of the motor itself. I have rebuilt pancake engines before but have now experience on these. I have yet to pull the heads because the yard says they will refund me in full if the motor wasn't serviceable. Is it trashed, expensive, or a normal rebuild issue.