On a V8 car there is a brass fitting where the brake hard lines go to rubber over the rear end. When Ford still made this they were like $9. I found a NOS at a Ford dealer online, dude wanted $80 for it. I ended up laying under a car at a grown up junkyard and getting one for $5.
Joe
you mean this part? - https://lmr.com/item/LRS-2073BRKT/mustang-v8-rear-upper-brake-hose-bracket-86-93