Originally posted by Denny
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Denny, i went downstairs and shot a pic of the backside of a M20 block in the area you are considering for oil drain. I think that the spot you chose would work great, it is behind the boss on the lower right corner in my pic directly to the left of the main bolt with yellow paint on it.

Edit: Your drilling would enter through the boss with the center of the hole in line (horizontally) with the edge of the oil pump mounting boss right below it.
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