The US '27 passenger cars have an aluminum radiator shell. Canadian have a nickel plated steel shell. Trucks have a black painted shell. All are of the same design. Also the '28 1 Ton trucks used the '27 style steel painted shell.

G Day TOM

It is my understanding that there are few types of radiator shells that were used on the 1927 models and this depends on the mounting bracket.

There is two types of mounting brackets.
The first type has a heavy metal bracket that has 4 rivets used to attach it to each side of the metal shell. The shell supports the radiator and shell as one unit. This one is the type found on most 27 -28 trucks and painted black.

The second type has a folded sheet metal bracket that is bolted to and forms part of the radiator support bracket. This type can be used on the car without the shell. The shell is attached around the edges with countersunk bolts under the hood lacing. Mostly used on cars with nickel shells and the aluminium shells. These shells have no holes or rivets down the sides at the bottom and are only held in place by the bolts.

One would guess that the strong bracket use on the truck type was to withstand the rough work that a truck would encounter compared with a passenger car.

Hope this helps
TWIN4