Upgrade to V8 suspension and use the 75-80 Granada front disc brake spindles complete. Also the dual MC and combination valve, is a direct bolt on. Complete Granada brake stuff should run about $100 at salvage yard.
While you're grabbing Granada parts, grab the 15/16" (one inch) anti-roll bar for another $20. :thumbup:
The complete 8" rear end from Granada or Maverick/(preferred) is a direct bolt in also. $ 50 with driveshaft.
The Falcon is the same wheelbase as the Granada/Maverick just a little narrower and of course, lighter weight.