The thing that is hard on the wheel bearings is the pressure on the belt. With a chain drive you won't need that kind of pressure.
Thats not really 100% true. While the belt pressure is constant the HP is simply "yanking your chain" (pulling real hard on the top of the chain)
You can create a whole bunch of force trying to rip the sprocket off in a forward direction.
Having said that, you should be fine as the loads will be temporary (only under acceleration)
Sounds like a great idea but be careful!
The Jack shaft will use HP in the conversion (not that that should really be an issue!)
I have already given the Sypder thing a good deal of thought.
If I have steering issues then I will simply "eliminate the threat"
With the engine change you will eliminate the Canbus the ECM the Nanny and likely the DPS all in one shot.
I like it!
Keep your mesurements for all the brackets you build.
I see a kit coming!(some assembly required)