Well, after a few days waiting on a new hub, I was able to finally put this to rest. It took a lot of patience and care to polish some light galling on the crank stub with emery cloth to where the new hub would engage smoothly pn the crank and up against the crank sprocket at the end of its travel.

I also used a new woodruff key to replace the damaged one and it fit the crank channel perfectly. It seated completely but still allowed for a slight rocking motion in the crank groove to allow for some minor range of adjustment along the curve as the hub channel engaged it if it was not perfectly level.

Of course as luck would have it on what was supposed to be the final mounting after the crank seal was installed, the key knocked out, clunk, bottom of the oil pan :mad Oh well, due for an oil change anyway.

One of my most valuable tools, an aluminum pencil magnet, inserted through the drain hole and wallah, the new key and the sheered end of the old key.

Reengaged the key level and seated the hub smoothly. I found that warming up the hub to about 130 degrees helped tremendously in slipping it on vs cold which would require tapping on. Also advisable to mount the hub alone separate from the balancer and pulley as those can be attached later and not having all that weight will allow you to engage the hub squarely and smoothly onto the crank. The balancer can only be fitted one way and the pulley itself is balanced so does not matter, but the backside will tell you how to mate it if you want to be exact.

Surprisingly, torquing the hub bolt was not too bad with a rental torque wrench that would get up to the 320NM. With the hub backfaces full seated against the crank sprocket, once you snug the bolt, torquing should be quick.

Note, if you have the multiple washer setup as I did, make sure you coat all mating surfaces with oil between the washers, since you should also coat the threads, you best bet is to fully immerse the washers and bolt combo in some motor oil prior to installing.

Many thanks to dieselbenz1 for the tips and assistance, Hopefully my notes will be of use to others.

__________________
Stable Mates:
1987 300TD 310K mi (Hans)
2008 Jeep Grand Cherokee OM642 165k mi (Benzrokee)