11x 2 1/2 rear brakes parts questions

Ok, sorry so long to get back. But on the upside we got 60 birds between the 4 of us. Downside is that there is about 12 inches of snow and below 0 temps here now.

I got some better up close pictures. I don't have any of the ebrake cables or hardware on because I am unsure of what year parts I need for the struts and park brake lever. I do have the cables and the spring and adjuster hardware kits. There are ebrake struts listed for up to 70 and then 71 to 75. Is there any numbers on the back plates or brake pads anywhere that I can cross reference to see what they are and then get the right associated hardware and brake strut or does it even matter which one I get? . Any help appreciated, Thanks.