You would think so, but that just wasn't the case. The added metal from the auto-choke mount made it practically impossible to get any extension to reach the nut at a workable angle. I didn't have a universal joint attachment either, and I doubt that would've worked either.
I did manage to get the nut off today though. It took me at least 2 hours and fiddling with several wrenches going between the exhaust and the engine block, huge pain. Will definitely be trying to remove some metal from the auto-choke mount to make that nut more accessible!