Re: what type of hubs to use.
It all depends on how your upright is constructed. Original uprights and some aftermarket units use a thru shaft and hub assembly with tapered roller bearings which require preload. Some use a unitized press in bearing that accepts a CV joint with a threaded snout which is splined to the hub, much like a front wheel drive setup. Then there is the bolt up bearing such as those found on Corvettes etc. that simply bolts to the face of the upright and accepts a splined shaft and hub. They all accomplish the same job essentially, and it all depends on how close you want the upright to look to original.
Do some searching on the forum and you will see a lot of setups to get some ideas.
Scratch Built Spaceframe, 289, Pin Drives, ZF Box