I was able to clear my fender-well, also with no cutting, using a Jeep TJ power brake booster, and the frequently used 1969 Corvette master cylinder. Also note, Eric Younger/D & C Extreme, also sells a full assembly that both clears the fender well and is very attractive. I did the Scout 2 dana 44 axle upgrade front and rear. I have the Scout 2 disc upfront. Originally, I had purchased the standard Cadillac rear disc brake kit, that several light line dealers sell, and/or people put together from junkyard parts. IMHO, the Cadillac calipers are junk, dumped more money into them than I care to share and I have finally moved beyond them. TSM (The Street Machine), the same company that put together the Cadillac kit, also sells , IMHO, a better kit that utilizes Wilwood calipers. My stopping power is incredible, and can't say enough good things about this kit. The Wilwood calipers are also Corvette parts, so if you were, to say, have a brake problem a couple of states away from home, you should be able to pick up parts at a local auto parts store, same as the Cadillac kit. Another option is hydroboost. Not personally a fan of this, seems like this leaves a complicated mess under the hood, but it seems that everyone who has jumped thru the hoops to install one loves it, so who am I to judge? Either way, trying to be complete as possible. Good luck, please post which ever path you take.