Front "cow catcher" bumpers

[forward]

When were these phased out?   Any idea at about what RQB vin?    Confused as I see many without, (photos) but I thought they were used until Blake took over.

Thank You

[Jim78]

Many consider the add-on bumper very unattractive.   As a result, many of these bumpers have been removed.  My '78 was originally equipped with one, but it is now gone.  Some choose to leave the frame extensions in place and use them to mount fog/driving lamps.  I removed the extensions, as well, and went to a '63-64 grill.