Hey guys, I was going through some garage stuff and came across a Holley carb I had. I can't recall how I got it or what it is. I was hoping someone here could help me identify it. I went on the web and the holley website and did not have much luck finding any info on the carb. Here are the numbers I found on the carb.

6R-4237B
4923 3
List 6853 0990