Here is a recent installation of one of my speaker brackets in a '69 Dart. The owner used a pair of 3-1/2" Blaupunkt speakers with no fitment problems. Let me know if I can help you with your project.
As Jerry mentioned above, just installed his speaker plate in my Dart. Highly recommend it and I was able to install it w/an already assembled/installed dash. Huge difference from only the 2 - 6 x 9's in the rear. :thumbup:
