The stock fox rotors are vented internally. The reason they are prone to fade is the incorporated hub/rotor design doesn't really allow for heat to escape as readily as the more modern slip on rotors that most modern cars use.
With fox brakes, a quality rotors (ie...quality of the steel..not holes/slots) with some good pads, fresh brake fluid and some SS lines will go a long way.
Stay away from the 73mm SVO "upgrade". There isn't a proper MC to actuate the calipers properly. You'd really need to source out an early Fox 7/8" diameter manual brake MC....and then go through the nighmare of adapting SAE and metric fittings to make it work. The SVO MC is way too large and should only be used if doing the rear SVO disks as well.
Look into rear shoe material as well. Like said before, quality pads, and rotors with SS lines and a good bleed will go a LONG way. Won't be a Cobra disk upgrade, but for a street car it's more than adequate.