Welcome to the HAMB from Illinois. You might get more response to your AX15 question over here: https://www.jalopyjournal.com/forum/forums/the-hokey-ass-message-board.5/ What kind of bellowing adapter would enable this swap? Info: https://www.novak-adapt.com/knowledge/transmissions/manual/ax15
This might be helpful: https://www.jalopyjournal.com/forum/threads/ax15-behind-a-318-poly-solved.1032073/