As more lines get added, I am thinking there might be a need for a new field for Year, Make, and Model that is not tied to the casting, but is tied to the real car details. Right now the casting is the main way to see all entries for the specific vehicle, but this is tied to the strict casting naming so if you select 1972 Chevy Nova SS you will only see the two entries. If you search Chevy Nova, you will also see other results including those with Chevy in the title.

There is no good way I have found to see all Chevy Nova SS across all lines and then have the ability to select certain years only almost like you would filter when shopping for an actual car on cars.com or cargurus.com.