It won't work without the road draft tube unless you install a PCV valve instead of the road tube. If you plan to use the V8 oil filler, you'll need to install a fitting to draw air from the tube to a PCV valve, and install a series of angled baffles below the PCV to keep it from sucking liquid oil into the vent valve. You'll need to install a sealed fill cap, not a vented one, and run a hose from the air cleaner to the valve cover to let vent air into the engine.

Older 216's did incorporate the oil filler into the road draft tube with a twist-on cap at the top of the standpipe.
Jerry

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