"Keep it original". "The guy tried to tell me the whole car was factory original but I wasn't about to let him slip those SAE tapped holes for an optional frame brace past me. Told the guy guy to %$&* off."IMO only a notation should be on the instructions about possibly having to tap the holes. The reason being is that some who want to keep their car original would want to tap it a metric thread and use metric bolts. Others would rather not buy the expensive metric bolts and go with an SAE tap and bolts.
What a ridiculous notion.