Measure and template with cardboard first. The dual receive adapters vary in space between the upper and lower.
In my case, we use one to Dolly tow as well as a cargo basket (with 150 lbs load}. The cargo basket is has an offset bar which raises it enough to clear the dolly.
Depending on your needs, you can get a dual receiver with a long hitch adapter for clearance, or a hitch with a second receiver on top.
2016 SS 2250 E450