Building a 370 with a lot of Holley swap stuff. Put holley pan on finally and was turning engine over by hand and it stopped. Went back the other way and same thing. Uh oh. Pulled the pan off and found that #2 rod bolt was hitting pan. Ugggg. The pan has a cast in bulge right in this location but it was just a little off. Great. Took a little off the pan with a grinder but it wasn't enough and didn't want to go too deep. Had to grind down the offending bolt head. Nothing like having to make a bunch of metal bits on an engine I have taken so much effort in keeping clean. Properly covered engine with large garbage bag except for the one bolt and did the deed. All good now. One thing that really aggravated me is the large "China" insignia inside the pan. Come on Holley ! Had I known this I would not have used it.