There is a dead link in that earlier thread. The front hood emblems are also different.

Master Parts Catalog group 1.268 (check the end of the listings in that group). UTILITY refers to 1.5 and 2 ton trucks.

So, there are various different grill parts for five different grill assemblies in 1954/55:

1. 1/2, 3/4, and 1 ton cab and panel trucks.
2. D-D tucks (step vans)
3. 1.5 and 2-ton trucks
4. COE trucks