Woodgrain panels: late challey's after Jan '70 got 'em, early one did not, regardless if they were JH or JS cars. On 'Cudas only Grand Coupes or cars ordered with leather got woodgrain inserts.
On a '70/71 E-body, only B51 would be on the tag, not B41, but I agree there are exceptions to any rule as I have seen S15 on a fender tag before on a '70 Grand Coupe 'Cuda once.