I found a R/T power buldge / air grabber hood and purchased it and was told it was a 71 and looking through the 1971-1974 Charger specs it appears they was only available in 1971 and probably was only installed on a possible 362 R/T's and Super Bees that was made . Is this correct and exactly how many of the hoods was made in 71 and was they available any other year?