The nuances of AM speaker brackets ('65 Barracuda)

@Valiant63 and others- I use door speakers from Dodge Vans, about '85-'96. They are the correct 6" x 9" size for the original bracket AND are the correct 8 ohm resistance for the early AM radios. Depending on year it can be helpful to get the Vans speaker plug and a couple inches of wire lead to adapt it to your harness.