Well my motor that was built by mike and it leaked oil from several areas. It leaked twice on the dyno through the rear main. Mike charged me for machine work but now that its at another shop i found out he never ported the heads, didnt machine or redeck the block. I bought his roller lifters and 1 failed after less the 1500 miles. I know why he is out of business. There are alot of people with my same story. I had at least 8 others contact me after i gave him a honest bad review. Mikes reply was that no builder guarantees a motor from leaking oil.