The Fiesta brake conversion is designed to allow for larger, better stopping brakes to fit under 10" or larger wheels.  To do this, 8.4" rotors will need to be turned down to 7.9" (which, if one doesn't have access to a lathe) adds to the cost of this conversion.  The following is an estimate of costs, per Tori Miller:

Custom brake hoses $100 (possibly less) 
Fiesta Calipers $80 (with pads)--> US Spec 1977 to 1979
Metro drive flange (HUB) $100 each, new.
Machine work on making 8.4" rotor down to 7.9" $25

Rotor Size Differences	Hub Comparison	Holes Drilled
Caliper Side-by-Side	Slide Mounted	Slide Mounted- Front
Clearance Problem	Proper Clearance	Proper Clearance- Close-up
Finished Caliper & Hub	Caliper Mounted	Finished and Mounted in Wheel
Conversion Hoses	Brake Hose Bulk Head Fitting	Brake Hose Caliper Ends
Bulkhead Fitting End Inside	Caliper and Hose Finished