8 3/4 rear brake lines

I think I can use these. How do you determine which year rear end you have? I have an 8-3/4 that will need a full rebuild, but I don't know what year it is from.
I don't have the answer for you. Sorry. It's a matter of location of junction fitting where it is located on rear. Ask the folks here. Can you get pict of rest with brake lines?