It doesn't hurt that replacing the dash pad gets you most of the way toward "re-VIN-ing" a '70 Cuda......
Regarding the '71 LS-6 Chevelles, I think '71 was a big transistion year for the manufacturers between upcoming emissions and falling performance sales due to insurance. As a result, a number of things got killed in the 11th hour, well after tooling was made up and parts were made. Ford's equivalent would be the 1971 Boss 302 Mustang. Promo pics were taken, and a number of parts and even '71 coded "Boss 302" decal kits have made their way out into the marketplace.