Mark has really out done himself on my engine. He has done many things that have not even been mentioned anywhere that I can find. For instance, the valves were machined from Supertech valve blanks. You can't go out and buy them. He machined them to his spec. The exhaust valves are Iconel. It will be interesting to see what happens. The process of step deck cutting the block is also interesting. I can see why an unknowing shop installing Darton MID sleeves would have issues. The process is complicated and has to be perfect.
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