Rear brake lines on an 8 3/4 question...

https://www.summitracing.com/parts/...Y211qYm66Nlry_5JiFTxWBvyuvCQCZswlsaAmZf8P8HAQ
These are the correct size for the locating pin on your springs.
They are absolutely necessary for about 20 reasons unless you don't have leaf springs.

Mopar Duster Belvedere Fury Valiant Barracuda Rear End/Axle U Bolt Kit | eBay
I suggest U bolts like these to not smash your axle tubes and grip them tight.