Hello all...I am working on a 1959 Chevy NAPCO 3100 project. When I bought the truck it had no front brakes or front wheel cylinders. I have since learned that I am looking for 1949-1955 Studebaker 2R5, 6, 7 truck brakes with self-adjusters. I have found a source for the Studebaker parts however I am struggling with the brake wheel cylinders. No one seems to know what NAPCO used and I cannot find a used set anywhere that I could send in for rebuild....and I don't even know what they look like! I cannot believe that they would be made exclusively for the NAPCO and wonder if the Studebaker 2R5 wheel cylinders would have been used along with the backing plates. Any help would be appreciated. Thanks so much. -Steve-
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
On my 1957 GMC 1/2 ton Napco, they are "stepped" wheel cylinders on the front (2 different sized cylinders). When I rebuilt them, I had to source the wheel cylinder rebuild kit from a Studebaker website (I don't recall which one).
Jim Carter Truck Parts has some for 55-57 Napco Trucks. Part # NA125L and NA125R. You can see them on their website for reference or call 800-842-1913.
1957 GMC 100 * Line Built Napco * Pontiac 347 * 89" Stepside * Purchased new by Grandfather from my Father's dealership in 1957. 1967 Camaro RS Convertible 1968 AMC Rebel 1966 Ford F100 Crown Vic swap 1968 Mercury Cougar Barn Find
Following up with GrandpasJimmy, I looked up the parts info for 55&57 GMC 1/2 ton with "driving front axle" and found the drawing below in the 55.2-60 GMC Master Parts Book. I know this is GMC info and you are asking about Chevies, but MAYBE they are the same????
The slave cylinder does look like it is different sizes on front and rear in the drawing. I can get GM part numbers for any of these parts and maybe one of the part number gurus can find the parts.
'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.
