You can easily pull the KLEEN stuff off with no problems. Either cap off the rubber elbows or make up some new covers from 1/4 inch aluminum. It's a nice easy shop evening to do so and makes it easier to lift out the valve cover. Cap off the spigots that the hoses to the KLEEN valve connected to.
Some of those other hoses are not emmisions related but rather ram air related. Carbs need to vent to the atmosphere but with ram air added the pressure can mess things up so the carb vents are connected and run to a neutral point in the ram air ducting so it all stays in balance. These hoses you need to keep. This would be the fat hose to the right of the air injection valve body...... or maybe not..... What's that bit of casting at the top of the pic just below the frame hoop that the big hose connects to?