On a 3V you will only need a catch can on the drivers side. You can get a regular JLT catch can if you would like which will help blow by from enter back into your engine. You will periodically have to empty it as it empties into the can. You can run a breather setup on both PCV valves and they vent to atmosphere or you can use the Moroso Catch Can which is basically a breather setup. It's all your choice and what you want to use.