Drilling Carburetor Base for Ported Vacuum?

[4Cruisers]

I checked out a local machine shop this afternoon about drilling a vacuum port for distributor vacuum advance. The set-up time would cost more than the actual drilling, and would be cost prohibitive. I could probably do the work myself, but don't have a drill press, and the bit (0.020" to 0.032") is really small. I don't want to try and then have to scrap the part if something goes wrong. What other options do I have?

 

[spotcruiser]

Jim C or Mark Algazy.