The 1970-71 collision parts book lists one part number for the R/T hood decal - no color choices listed.
I don't know how trusting "collision parts books" are?, I have one Mopar 67-71 collision parts book that has pn#'s for 70-1 Challenger rear window louvers, one PN# for "standard" rear window louvers and another PN# for "SE" models??????...I like to see a set of those...Hmmmm
But in regards to the R/T decal color...some will say black was the only choice, yet other sources say Black and white being the only choices?
here's a supposedly original Mr Norms Hemi Challenger, and one of Alan Galant's recent restos, and Alan is usually a stickler for keeping the car "original" in it's original as built/ordered form