1957 Chevrolet trucks destined for the NAPCO installation came from the assembly line with a riveted on crossmember for the NAPCO crossmember. It also came with a 5600 pound gross weight designation on the ID plate on the cab.
As far as where the NAPCO kit was installed, I don't know.


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission