Do you have any pictures of what your car looks like upclose?
Sorry, a little off topic but just in response to jacksboys....
You don't want a REAL up close pic as you'll see the rust forming on the rockers!!!
Here's a pic I had handy. It has a wide black section with a black pinstripe above it. I like it. Again, I think it was done by the previous owner that way.
In response to whether or not the M46 cars had the black out, I have no idea
but all I know is that Mopar did some things off the beaten trail and the more I get into this hobby, the more weird things I hear have been done. Much I'm sure can't be documented but never say never in my opinion.
This might end up the way of the 1970 Challenger R/Ts with 340s from the factory....