I have heads with a casting number 14022801 that have been modified to 2.02/ 1.60 valves. I do not know what they came on or what spark plugs to use. can anyone help  

Those are chevy 305 heads and were used from 1980-1986 the spark plugs you will need to use would be ac delco R45TS.  

thanks yeah thats what i was using in my 305 but did not know if they had a different heat range or anything for these heads since i think there newer.