i will probably get flamed for but this comment.
if you ask me a non numbers matching 383 charger with different motor than the original one, with a non numbers trans, in the original color. really isn't worth much more than a color changed color one. with all of the changes to it having documentation won't really make any difference.
IT'S YOUR CAR. do what you want with it.
and will add I like to be different. A lot of Red and black ones out there. Paint it whatever color you like except Plum crazy, Panther pink, or school bus yellow