Ther'es.. a lot going on here. First, that chassis looks like it's using "completely normal" bulkheads. Second, it looks like you could, if you really wanted to, chose your motors rotation direction.
I wonder if these have less drivetrain friction than a belt. You don't have to deal with the belts hysteris, and you're looking at two more bearings. This would be a fun one to dyno.