There is a salvage yard near where I live that has a many older cars with the many “typical” parts still intact.
During the restoration of my 69 RS Z, I spent a day at this yard, look for a few odds and ends, and noted the date codes on various items vs. the build date of the car for reference. My notes were taken 12/18/97. I can not verify if these steering boxes were ever replaced and original to the car, so take this info as reference only.
The box assy date code were all stamped on the al. box cover, in the machined pad area on the RH (passenger side) of the box. Two (2) of the covers still had the oval yellow decal toward the back LH side area of the cover under a layer of grease and dirt. Sorry I did not have a digital camera back them or I would have photo documented the data codes and boxes.
Here is the list:
Car Build Date Steering Box Date Separation (months)
69 Firebird 11A 277 8 1
68 Firebird 03C 031 8 2
68 Impalla 10C 280 8 same month
68 Impalla tag missing 235 7 ?
71 Pontiac Pass. Car 10C 284 1 same month
66 Pontiac Pass. Car 10D 256 5 1
66 Chevelle Malib 12C 399 6 over 365, 399 may be wrong or a stamp error
74 Nova 10A 240 4 2
69 Pontiac Pass. Car 07E 171 9 1
68 Chevelle Pass Car 05B 078 8 2
My 69 Z 05A 081 9 2
