Small block 400's???

[68Gold/white]

What years did the small block 400's come in these pickups??? I've seen one in a 79, and maybe one in a 78. These were both original engine pickups, had quadrajet carbs, AND both these pickups were 4WD...
Just wondering what the date range was of these engines in pickups...

I do know the SB 400 came in 71 and 72 big cars (maybe other years, possibly 70, not sure about 73 and newer...) they only came with 2 Barrel carbs, but still ran awesome, my Mom had a 71...