Brew,
19301326 superceded 19258770, at least according to the 2014 Chevrolet Performance Catalog:
http://www.chevrolet.com/content/dam...ce-catalog.pdf
In an even more confusing twist of fate, the 2014 catalog refers to the LS3 crate being equipped with the "Chevy SS" oil pan, which is anyone's guess what they're referring to. The all new Chevy SS 415 HP sports sedan? Camaro SS? Trailblazer SS? A factory stockpile of pans from the now defunct Silverado SS? The factory pan from the 5.3L L33 (Impala SS)?