[VintageLambo] spark plugs

Merry Christmas everyone! Need some suggestions here. Have not had my Espada that long and just got the Sears tool for sparkplug removal(works great). I removed Bosch WR5DP. I have been very happy with Bosch plugs in the past with some of my other cars. However I do not really like platinum. I usually use the triple electrode copper plugs such as WR7DTC. I am interested in what others have been using. I dont know if Bosch makes a WR5DTC, would have to check. Is the WR5 the correct heat range for the Espada? Alex Penrith Los Angeles, Ca 75 Espada