All of the lines on my '57 5700 are 1/4 in. From the master to the hydro-vac and from there to all wheels are all the same. I used a 25ft. roll of cupra-nickle and all new rubber hoses


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy