According to the 1929-57 Chevy Master Parts and Accessories Catalog, 1947 2nd series -1950 1/2 tons used GM# 3686522 with an overall length of 40-3/4". The 1951-55 1st series used GM# 3694170 with an overall length of 40-7/8". Jim Carter offers
MEB456 to fit 1948-55 1/2 tons. His description does say some minor modifications may be necessary. The Filling Station offers
FS-392 for 1947-55 1/2 tons. Their description does indicate there is an added part
RW-1 that is required on each cable to adapt them to your 1950 1/2 ton parking brake actuators. Hope this is helpful.
