Damn, someone has all the answers! Must have really improved your fab skills ey?
James, you need to pull a wheel off and measure to see how big a wheel you can fit. Probably won't have any problems with a 7\" wide wheel, but you have to get the off-set right. Check out Shop Talk Forums, there are hundreds of post on there about this.
As for the bolt pattern, you can re-drill or by pre-drilled drums and rotors in the 4 x 100 pattern.