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If there’s one thing we failed to point out in Part 1, it’s the location of the thrust bearing. Shown here, the thrust bearing should go on the No. 3 main bearing position. Either through assumption and/or pride, your author placed the thrust bearing in the No. 5 position during initial assembly. It wasn’t until after the engine was in the car and running that we noticed the excessive crankshaft endplay. Thankfully, Modified Mustangs & Fords Technical Editor Mark Houlahan was able to identify our mistake and assist with fixing it. We ended up replacing all five main bearings, and no other damage was caused.