1965 Dodge Dart Charger

During my search I have found out that the black resonators were only used for a couple of month and later switched to the stainless steel tips model. However I'm not sure exactly when then changed but probably in late 1965 production.

Does anyone have a complete set of 1965 Technical Service Bullentin? I'm not sure but that might be the place to get info from. As always, any help is appriciated.