You are right, I shouldn't have moved the crank. I also shouldn't have attempted this without having a good helper. I believe I could have done it myself, if I would have been more careful about always having a vice grip on the chain to hold it to the cam gear. But I didn't realize there was so much tension on the drivers side, I thought just having the chain wrapped over the sprocket would keep it there, boy was I wrong.

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87 300D - Running on Veggie oil; 260,000 plus miles; Original #14 head