Probably not. I wouldn't chance it. Brake lines corrode from the inside out and I'll bet yours are pretty crusty. When it comes to brakes I believe in do it once, do it right, do it all. Brakes are too important to leave anything to chance.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.