Is the tranny stock? If yes I'd use stock Mustang HO cam. If not the TFS Stage 1 works well with those heads. TFS spring kit is also a good upgrade. As far as rockers, 1.6 FRPP or Scorpion, etc are fine.
spring kit
Trick Flow Specialties TFS-2500100 - Trick Flow® Valve Spring Upgrade Kits -...