We ordered a Winnebago swivel seat base part number 176846-03-01A. This part did not fit our 2020 (2019 chassis E350) MinnieWinnie. The center to center measurement of the studs on the underside of the Ford seat measured 11 3/4 inches where the corresponding holes along the left and right sides of the winnebago base measured 11 1/2 inches. If you are contemplating purchase of one of these swivel bases, you should have the supplier measure the center to center distance of the left and right sides of the base. If it measures 11 3/4 good. If 11 1/2 inches. Bad. Shipping to return the base is about $50.00
Marty
Marty
