Those hard lines aren't the only parts to deteriorate, rubber breaks down over time too. So while you've replaced the rusting lines, the hoses they attach to could also stand to be replaced.
Fine Lines
HSK0060SS - 93-01 Cherokee; Complete Brake Hose Kit; Stainless
Sale price$166.85
In stockSave $16.95
Fine Lines
HSK0064SS- 84-87 Corvette Complete Brake Hose Kit; Braided Stainless
Sale price$152.58
Regular price$169.53
Re-stocking soon