Nothing confuseing really.
I will explain it clearer this time. Jeep NEVER EVER EVER used a BOP Patern Transmision in ANY Jeep........ It was a Buick NAILHEAD only bolt patern. The Only way Jeep was able to hook up the Nail Head transmision was through an adapter ring Like I have pictured here, a different adapter was used for each different bolt patern used. AMC 327, and BOP for the Buick 350, and the later standardized AMC bolt patern. 3 different adapters in all. NAILHEAD Adapter
UMMM This look familiar??? I pulled a 454 from a Chevy Pick up this TH400 was behind it. Looks like your pic!
Chevy Bolt patern