As you found out, Mopar only sold them as a hub and drum assembly. Neither were sold by them separately. The aftermarket only sold the drums, no hubs, so, you had to do as the others have mentioned here.
Hopefully, you got the correct transmission. There are both 2 speed and 3 speed versions that year, and they don't interchange without converting everything from one to the other.
Those bushings can break if you try taking the transmission apart. Leave it complete even if you have to pull the column, glove box insert, and instrument cluster. I would recommend doing all three. It's a good time to get everything working on the cluster. New bulbs, and maybe new bulb holders...
Later cap. After Jan 1st 1970 they started using EEC fuel systems. There were a few versions of them too, based on year. The differences were in the lug sizes and depth of the inside.
My understanding is that you replaced the original small bolt pattern axle with big bolt pattern ones. If you're just redrilling the small bolt pattern axles for the larger pattern and 1/2" studs, ignore my response.
I just installed the whole exhaust system in my '66 and it has the same Accurate hanger for the resonator. Has anyone had a problem with clearance in a few areas? Mine is a mix of NOS parts (the front Y pipe, rear tailpipe, and the rear resonator) along with Accurate's intermediate pipe and...
Here's what the lower hose looks like once I installed it as an upper hose. About the best that's available from what I can find, and I think it looks totally acceptable.