Thanks for the encouragement. On my list of things to do is back off the ignition advance. I've heard that too much will cause the crank to vibrate badly on the m20. At first I thought my valves were hitting the pistons- the noise was that bad.
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-Daniel

M20 swap blog: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,277525/