Not sure if this is within your budget. Cheap being a relative term. Check out these links. Some pretty good info. I used most of these tips to get me going.
79-93 4 Lug Ford Fox Body Mustang Brake Upgrade
Mustang Brake Conversion SN95Brakes.com
For the front:
I upgraded to the SVO 73mm Calipers. These sell at performance shops for $140 each. Using the advise from the link, about $30 at Checker Auto with a core.
SVO master Cylinder also from a local retailer.
Modified the proportioning valve.
Caliper sleeves and stainless brake hoses from Maximum Motorsports :: The Leader In Mustang Performance Suspension
Powerslot rotors and Hawk HPS pads.
The rear:
SSBC rear disc conversion. (Not a cheap option.)
79-93 4 Lug Ford Fox Body Mustang Brake Upgrade
Mustang Brake Conversion SN95Brakes.com
For the front:
I upgraded to the SVO 73mm Calipers. These sell at performance shops for $140 each. Using the advise from the link, about $30 at Checker Auto with a core.
SVO master Cylinder also from a local retailer.
Modified the proportioning valve.
Caliper sleeves and stainless brake hoses from Maximum Motorsports :: The Leader In Mustang Performance Suspension
Powerslot rotors and Hawk HPS pads.
The rear:
SSBC rear disc conversion. (Not a cheap option.)