Here's a steering assembly out of an early built 69 Coronet 500 (Photo 1 of 2).
F278 = June 28, 1968 casting date
1908 = 190th day of 1968 or July 8, 1968 assembly date.
Submitted by Doug Hammer

Steering assembly out of an early built 69 Coronet 500 (Photo 2 of 2).
Submitted by Doug Hammer

Ring assembly 10/19/68 = October 19, 1968
Submitted by Doug Hammer

A/C dryer = 184th day of 1969
Submitted by Doug Hammer

Glass date code = August of 68. Other date versions exist.
Submitted by Doug Hammer

The dimmer switch is a week/year code 399 = 39th week of 69.
Submitted by Doug Hammer

Wheel Dates
Submitted by Doug Hammer