It has some holes, but they didn't align perfectly. I could see a slot in the carb that appeared to lead to a hole. I trimmed a light amount from the gasket starting at one of the small holes. I could see the pattern of the slot on the gasket and followed it.
Now that I think about it, I didn't check to see if vacuum was improved after doing this. I did observe the vacuum advance arm move in and out when I throttled up and backed off.
