The 70-71 Cuda and the 70 Challenger were the only E-bodies with the option of the woodgrain rimblow. Why the 71 Challenger was left out, I don't know. Of course it don't stop a lot of guys putting them on anyways. I've sold or restored rimblows for just about every Mopar from the early 60's to the late 70's.
Mopar made a few different style rimblow wheels and had them available as an option for most body styles from 70 to 74 or 75.
Dave