help needed with 904

Definitely different. It's a 76 360 904/999 standard ?
But here's the thing- when I went to Portland tranny this morning and the guy pulled out the supplementary seal only kit for 72 and up and it still wasn't the same. It was when we went through those three boxes of extra kit stuff is when we found it? Oh you know my luck that I have likely one of Ma Mopar's Mistry Transmissions LOL

they should take the same lip seal....the rear drum is always a pain in the *** to get the piston back in...