Off-road rims?

Just curious, I'm going to Vegas tomorrow for a bike convention (Interbike) and saw some pretty nice looking wheels on Craigslist for a good price.

Black Cragar's, which I later discovered where off-road rims. Here is a link.

Are off-road rims worth checking out for an A-body? Lots of styles available in the 4.5" pattern... Thank you Jeep.... :D
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The Cragar's are 15"x7" with a 4" backspace. Only thing I'm worried about is the disc brakes clearing.

What do you guys think?

Yay or Nay?

Sorry if it sounds dumb... Thanks!