1957 GMC 102 (1/2 ton long bed) and 152 (3/4 ton long bed used different brake slave cylinders. I don't know if the fittings were the same size or not.
The GMC Master Parts Book covering 1955.2 through 1960 did not list any metal brake lines for trucks other than bulk tubing listed below. NSTXY are model year designation (N=60, S=59 & 59, T=57, X=56, Y=55.2). 10, 15, 25 etc are models where 10 = 1/2 ton, 15 = 3/4 ton, 25 = 1 ton etc. Looks like they expected the mechanics to bend their own. "CTL" on the right side is an abbreviation for "Cut To Length".
By the way, there were no "short bed" 3/4 ton 55.2-59 GMCs, so don't expect a short bed GMC kit to fit.
Last edited by Bill Hanlon; 03/08/20258:43 PM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
