That is correct, the R/T emblem does not belong on the grille. Your car is not an R/T at all, the other way to tell is by the first two digits in your VIN, if it said JS it would be an R/T, but your car is a JH, but do not let that discourage you at all - your car is a 340 car which makes it desirable.
Plus to think, you were 3 years old when this car was put away in storage, that is simply amazing in itself.