The lines in a 68-69 coronet 1/4 are a lot more defined than on a 70 coronet. They would be required to make completely new tooling for 70 coronets. Its not like changing the marker light locations on a 68-69.

But they are needed!

Scott

70 Coronet RT 440+6
64 Dodge 330 - Future Hemi Clone
17 Challenger Hellcat - Green Go Driver
86 Buick T-Type Turbo V-6