Here's another thought on the bumble bee stripe being not too common.
If you had a base non-R/T Challenger with the 340, you could get option code A66 which would include a bumble bee stripe (could be deleted).
I wonder if the people ordering big blocks didn't want thier car to be mistaken as a 340? Also with the R/T optioned cars, IF they already had a stripe saying thier car was an R/T, they couldn't get both stripes.
Yes? No?