front brake shoe 10" hardware image
Refer to your shop / service manual.
This is 10 " front brakes from 66 Dart (I suspect 65 would be the same) available here:
MyMopar - Mopar Forums & Information - Service Manuals
Lastly, Your adjuster does not seem to be extended at all and that would make the cylinder have to reach farther to apply the shoes and give you really weak breaking if at all.
Also have you measured the Dia of the shoes? could they be 9"? is your drum really 10" ID? I have seen people measure the OD and call a 10" drum an 11 inch.