It could also go back to the 64 Plymouth b body cars Satellite, Belvedere, Fury and Sport Fury, I had one on my 64 Sport Fury 426 street wedge 4 speed car.
The only car that came with that hood ornament is a 1967 Plymouth Satellite or Belvedere GTX 426 Hemi car…66 Plymouth was different and had a decal on the back side.
Six cyl cars were blank at the bottom.
273 cars had "V8" at the bottom.
All others had the CID size call out.
4 barrel cars had red background on the size call out.
2 barrel cars had black.
Pretty extensive and somewhat elaborate.