LA smog must be getting to you man I blew the original engine with over 230k (close, Charles). The donor that took it's place in the engine bay, has 49k. The original engine even with the high mileage ran extremely well and healthy up to that second. Personally, I am extremely excited to take that cobb AP off and kick it off the nearest cliff once the car is running. I should have removed it as soon as I got the car.