I do not know what the "AD specs for the 2nd half" refers to. As I posted above, I took information from the 1955 SPECIFICATIONS - TRUCK 1955-2ND, and from the 1955-2ND TRUCK DATA BOOK (Task-Force Trucks).
The 1955-2ND TRUCK DATA BOOK SPECIFICATIONS CATALOG FOR CHEVROLET SALESMEN August 2, 1955 (book title is all upper-case) shows each of the 13 different single-color paint codes for the 1955 Task Force trucks.
234 G is Empire Blue
443 L through M were Two-Tone color combinations for 1955-2nd
Page 102 in the CHEVROLET 1955 SPECIFICATIONS - TRUCK states that the wheels were black on all single color trucks (no wheel stripes), but the wheels were painted lower body color on Two-Tone trucks (not the upper color, Bombay Ivory).
Bombay Ivory is shown as the Wheel Stripe Color for all Two-Tone models, except for Commercial Red, which used Argent Red (the red bled through Bombay Ivory).
The grill was painted Bombay Ivory and the De Luxe Cab interior was painted Havana Beige.
Regal Blue was not available in 1955, but it was available in 1956.
Empire Blue and Crystal Blue were also available in 1956.
