Just to help others out, Im going to try and apply the "NEW" style caliper to the "OLD" style bracket.
Basically for those of you who are interested the pin that the old style caliper slides on is removable. It looks as if you could install the new style calipers into the old brackets without modification.
Also a dremmel works great and the shield.
The other thing is that brake lines are pretty much universal. The differences come with how the brake line attaches to the strut. My 1990 legacy wagon will have wrx brakes in the front with gc8 agx struts using WRX aftermarket steel lines, in the rear it will have WRX calipers with 2000+ legacy brackets and the large rotors also with the aftermarket steel lines.
stimpy: bias adjustments would have to be car specific. WRX calipers on an older legacy will give more front bias, even though the rear brakes are the same.
edit: Hmm, I guess forester and outback models could have longer lines...