Excellent post KrazyKuda, which leads back to my original comments. These engines, especially the 340's are 40 years old, or more, and you have know way of knowing (unless you've owned it since day 1) how many times it's been rebuilt and more to the point the heads have been removed. I stand by my original statement to replace the head and crank bolting and I use engine oil (couple drops) on my threads definitely not moly or any paste for that matter. :glasses7: