When you say "unit bearing" are you talking about the double angular contact bearing with a common outer race. These are pretty popular for independent wheel driven setups.
Rex
Yes the standard unit bearings used in most cars and trucks now.
The Corvette ones are used in the new ZR1s and have been used in racing for years. You can get them with 5/8" or 12 MM ARP studs installed. Corvettes use the same hubs and spindles front and rear. We were thinking of using these in a FWD setup. There are aftermarket spindles/up rights designed for 15 inch wheels.
I have heard some mixed statements about this type of setup in LSR. IE non serviceable and you have replace everything when they go and they may come apart at speed. They are about $400 each.
Again the other option I was looking at is using a Howe, Vogel and Coleman full floating style hubs. They use the same hub/bearing/stub on the front and rear. On rear they have a drive plate and on the front they use a dust cover. Still about $400 total each but serviceable and you can buy individual parts. Also the option of better bearings and lower drag seals.
Gold colored parts are the dust cover verus the drive plate
You can buy front spindles for these hubs from Coleman. I was think putting inner bearing/bushings inside the spindle to support the stub axle inside the snout for the FWD setup. I would also need to figure out a way to retain the axle into the snout/drive plate. (Picture shows a longer snout for a W5 setup but they do have the short snout also.)
Coleman sells just the spindle snout if you want to build your own spindle setup or add to you rear housing.
A lot of the cars used a 4WD knuckle setup on the front. The trouble with those is the king pin to hub wheel mount is offset so much you end up with crazy offset (dually) wheel to get zero scrub and then you have huge out hub hanging out in the wind (Golden Rod hub bumps)