I went with JL Audio's dual 3.5" 4x10 replacement speaker recommended by Classic Car Stereos with the bracket for AC cars they say is necessary.
https://www.classiccarstereos.com/jl...-90-watts.html
Will be interested to hear how it sounds with my Hermosa and 6x9 C2 JL Audio rear speakers.
__________________
1970 GTO (Granada Gold) - 400 / TH400