Any downside to tapping timing cover for oil return?
You will want to mark the locations very carefully because a -10 drain (or two) likes to get in the way of the front accessories and belt.
I ran the tap almost all the way through on mine and then shortened the tip of the fitting so that it did not stick out too far.
If I had to do it over I would have used the pan to begin with, but every combo is different so do what lays out the nicest for your combo.
Minimize the bends involved and make sure you have the drain as low a possible.
Good Luck.
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