[updated:LAST EDITED ON 23-Aug-02 AT 11:54 PM (EST)]can i put a/c from a 1980 bronco in my 1979 f150 p/u thanks

 

Those are two different body styles, Big changes. It would be easier to use a 73-79 unit. The firewall modifications are extensive also. You might want to use the search functions, there are lots of threads here that discuss AC mods, There is even a whole forum for it:
[link:www.ford-trucks.com/cgi-bin/dcforum/dcboard.cgi?az=list&forum=hvac&conf=misc|Heating, Ventilation and A/C]