sorry to tell you this, but they are not all the same... I have 4 that lined up good, and four that were really bad. The rest were in-between. You will have to check each set. It sucks alot of *****, believe me. I will be getting those isky ones pretty quick, and making a weekend out of it. For now the valve covers got slapped on and we are trying to get it running. The guys at work are getting **** about my car being there for 3 months, so I have to get it burnin gas so I can get it home to do the fine tuning. I know it would have been easier out of the car, but not much choice left for me. If you have the time now, DO IT! you wont regret it...