Hey Dave, like Mike says what is considered late? Did you ever get my PM saying I found a set of spark plug wire shields? Just wanted to make sure your still not looking for them.
The ACC on the front tag bracket was on later production. Mostly all front tag brackets have a "C" stamping on either side of the lower mounting tabs, where it bolts to the valance. The same goes for the rear tag holders. The earlier holders have the 608 part number towards the center and the later has it up higher with the ACC stamping also.