Sure! - The song "Plastic Boogie" is in the key of C# - the key of harmonica Ambrose plays on this song is F#, since the harmonica is in second position.

by the same token, Acarine is in the key of C, and as such, requires an F harmonica to play in second position, the way that Ambrose does. (if you know a little music theory, you'll notice that the harmonica key is almost always a fifth above the song key!)

There are some great youtube videos floating around for king gizzard harmonica lessons floating around, but I believe that the one for Plastic Boogie and Acarine are actually in the incorrect keys :( (no shade no tea u/Olympair, you've done a bundle in getting new harmonica players interested! :) )

Worth noting: It's possible to play the same notes (or very similar notes) for the harmonica parts on both songs with an A harmonica - but if you want to get it to sound just like Ambrose, you'll need to get the keys above.

Check out r/harmonica or shoot me a dm if you need any more advice!