A few examples would be the 1968-1970 Dodge Charger have the same body but 68 has round tail lights and 70 has a chrome lip on the front. The 1964 Impala could have the trim/badging of Bel Air and Biscayne of the same year. The GMC Jimmy and new Chevy K10 could have both GMC and Chevrolet grill patterns and badging from 1967-1972 (there would need to be a new hood for 67&68 but the rest is pretty much the same. Not only does it add “more cars” and shine some light on lesser known names like Biscayne, it would also add more builds/restorations that happen irl with the different parts that fit the same.
Chargers:
Bel Air / Impala / Biscayne
Jimmy / K10
