Wheel base differences

There is definitely 111 and 108 on the darts, just search the sub frame connectors.

Early Dart sedans, hardtops and 4 doors (63-66) were 111" WB. Early Valiants were 106 " WB. Dart wagons shared the 106" WBs of the Valiants. I'm not upon later years but weren't Demons and Dart Sports 108" WBs while hardtops and sedans were still the 111" WB?