[RootBeer 6117]

Yep those would work I would say early 80's I am not exactly sure when they started the electronic Qjet but it wasn't around to long, in 87 chevy trucks went to throttle body injection
I think some of the big body gms used the electronic Qjet a little longer than the trucks. There is a number stamped in the carb you should be able to get some info from that with a little searching, you will need that to get a carb kit. I converted a 80 chevy truck to the 87 throttle body injection, once I got the bugs worked out it ran great, I almost wish I had used that set up in my 49 rather than the LT1 but that wouldn't have been as much of a challenge.
I have a entire drawer in my tool box full of Qjet stuff even the drill bit to drill out the primary throttle plate shaft and put in bronze bushing to stop the air leak from the shaft wearing the throttle plate.I rebuilt a few dozen qjets at one time. I also recently found my "how to rebuild and modify qjet's" book.