Ok, I took some pictures and tried to upload them, but had some problems. I’m going to try again. The mounted carb is on my ‘65 Dart GT convertible with a 235hp engine. I believe it is an AFB. The other carb is the original, I think, which I found in the trunk after I bought the carb. I think is an AVS, with vacuum secondaries, since it has a second set of butterflies mounted above the throttle plates on the secondary side. The mounted carb looked pretty new. Both carbs had the holes I ‘m talking about. Thanks for everyone’s response.