head gasket

It strikes me that when I did the build I checked on the coating. From what I read it use to be a must. But with advancements in gaskets the new ones had a coating. Right or wrong I dont think it would hurt to use a copper coat on the new ones just for spite. 440 source has a bolt kit for like $59 looks to be a good deal may go that route too. Appreciate all the advice and feed back everything is new to me so its not that I question the advice but I like to know the theorys behind stuff to learn.