It would be nice if Spanky entered this thread.

My 54/55 GMC COE did not have the "3 bumpers on each side along the firewall; these hold the rear of the hood halves off the cab metal (first picture)"

The same long rubber seal-strip (hood to cowl seal) was on the COE as was used on the standard cab & panel-body Chevrolet trucks.

And this front-hood bumper set was also used.