Intake manifold gasket installation help

These are stock 273 heads, this is the gasket set the rebuilder used, and I am completing the build using it. Everything is stock including the intake manifold, don't know of any other set to use and am open to suggestions. I'm starting get concerned about the plastic locators, are they really necessary? Wouldn't the manifold bolts locate to gasket?
Use the locators and forget what bs instructions say.
I've always used sealer around the water crossovers n corners..and with those gaskets. The gasket cinch is just incase you don't have locators..so they dont move around...it's just like automotive contact cement. Its specifically for intake and water pump gaskets. Use it or don't. Who cares, it doesnt...It doesn't care what the gasket is made of either..
I've used that gasket predominately for decades for it's reusability when only glued to the heads, unlike paper that oil soaks and will delaminate.