Front brake upgrade

Just jumping ahead in my thinking. In the process of installing all the new suspension parts and will focus upgrading the front discs in the Fall. Currently have the 9" Pinto set up that came with the ride and I have the origional CR 15" wheels with the center spinners. Many of you guy's have done this already so I am wondering how much larger a disc can I go while still using the stock wheels? What brands did you use and are you impressed with the results??

A 15" wheel will usually take a 10.5" to 11" rotor.  The real problem is the construction of the caliper.  Some are thicker than others, but with a 15" wheel you should be good with a stock type single piston caliper.  Emphasis on usually and should in the above statement.

Also, most stock type wheels are what are known as a "low hat" center.  They are intended for calipers that have pistons on the inner side like most factory parts.  Calipers that have pistons on both sides, like 4 and 6 pistons, won't clear the center of the wheel.  You will need need spacers or wheels with a high flange (high or medium hat) built into the bolt circle area of the wheel.  There may be exceptions to this, so if you're using aftermarket calipers, call the manufacturer to be sure.

Thanks Mike, I had hoped that working in a 4 piston caliper on a slightly larger disc would be an easy retro. Like all things I'll have to research it out. I had intended on keeping the wheels as I like the look of them despite their weight and it would be one less thing to spend money on (as if there was actually a budget for this thing). But if I did go that way she sure would look good with spokes. Hmmm.

After giving it some more thought, I should add that if you wanted to go with a full custom rotor setup you may be able to keep the wheels.

This would mean going with a billet type hub and separate rotor.  The rotor would use an aluminum hat that the cast iron rotor would bolt to.  These hats are available in different offsets, so you might be able to find a combination that would clear the wheels you have with a 4 piston caliper.  I'm not sure how much rotor offset you could get away with on the MII spindle.  

There may be a kit available from someone like Wilwood to get all this.  It could be done custom, but a new set of wheels would probably be cheaper.