Hold that thought then Jim as I *might* take you up on it, but still want to explore this 4x4 caliper thing first....

Reason being I am led to belive that 4x4 calipers jsut simply bolt straight up with 2WD discs, as shown here;

4x4 caliper fitting guide

So I would be interested in that more than having a multitude of washers, spacers, and brackets...