Brake Caliper / Lines

[capps]

I have a 1984 GMC Suburban K2500 4X4. I purchased replacement brake lines and calipers from two different sources. When I purchased the calipers, there were 6 or 7 different brake codes like. JB7, JD7, JB6, JD6, JB5, JD5. After doing a little research it looks like it may be a JB6 or JD6 brake system. I no longer have the codes in the glove box.

 

The replacement brake lines have this end and I believe it also fit on the caliper I removed as a core

 

 

The line I took off has this end on it

 

 

I am not sure which to swap out. Do I have the wrong caliper or lines? I did not notice the issue until I went to put it back together.

[GM-Tech]

I can't recall ever seeing a brake line like the one in the first photo. I'd have to say that's not the right one.