Brake, oh boy

[8uwav6]

Well I removed the brake reservoir lid to check fluid on my newly acquired 69 because the brakes barely work. The fluid was almost completely out in front and empty in back. The gasket immediately deformed and it will not longer seal. Went to parts store and bought a new gasket and topped of the fluid. So in order to bleed the brakes I tried to loosen the bleeders and all four of them are stripped out. So we went to replace the wheel cylinder and all brake lines are seized to brake lines. So where do I find replacement brake line that runs across the rear differential?