Chris,
Yes, It seems that the 1954 and 1955-1st series 1/2 Chevrolet trucks could have had pinstripes from the factory. The 1/2 ton trucks, with 16" wheels, also had a factory option for pinstripes. These are mentioned in both the Saleman Data Book and in the specifications manual.
My 1954 Chevrolet Suburban had a 1/8" cream medium pinstripe. I have seen 1/8" stripes and what looked like 1/4" stripes on earlier trucks. These may or may not have been factory-applied. Also, maybe different painters applied/different width pinstripes.
Tim
