Very clean, besides the magnesium wheels I believe those are the second lightest factory Vette wheel at about 17.5 lbs, which if memory serves is 4-5 lbs lighter than stock per wheel.
Because the front wheels are 17 and the rears are 18. On the Vette it doesn't matter, but on our trucks, the tires have to be the same height. For these wheels to work, you have to buy perfectly matched tires. Here is a good discussion: http://www.syty.net/forums/showthread.php?t=50374
If the overall diameter of the fronts doesn't match the rears, you'll put heavy amounts of stress on the transfer case and eventually destroy it.
It's been discussed on here pretty regularly, and you could use staggered wheels, but I believe the overall difference in height can't be larger than 1% (someone correct me if I'm wrong).
I had a set of these on my Camaro I sold to get my Ty. I had 315 Nittos drag radials on the rear and some 275 BFG on the front. When I sold the car I tried to work the deal to keep them since I already had the deal worked to buy the Ty. If you have a decent tire shop close you can take them up there and tell them what size you want on the rear then a matching height tire on the front and they can order it for you, even if it is a 17 front 18 rear.
I could be wrong, but i think the stock tire sizes on those are 245/45/17 front, 275/40/18 rear, they are not close enough diameter and WILL damage your t case. This topic has been gone over here numerous times.....a simple search would have helped you out. If they are in new condition though im sure you could sell them and get the tire size you need for your truck. They will look great on the truck once there on.