As many of you know, I've been looking to replace the Holley Commander TBI on our FIA with a carb. So, I have wound up having a good friend donate a pair of used Holley carbs to me. Since we've been running Edelbrocks, I'm in the dark about how to ID a Holley. What do I need to look for in order to determine model, etc. about getting rebuild & replacement parts?

Here's what I do know: carbs were installed on Jeep 304. One was on the Jeep when the guy bought it, the other was in a box of parts that came with it. They look similar; my guess is somebody just swapped the newer carb on in place of the old one. They both have vacuum secondaries and side-hung floats.

Any info would be appreciated!
Thanks!