Carb draining?
86?
Not one of those electronic Q-Jets?
Older Q-jets are what I run. I got a pile of them.
Take the base off. And those plug right in the middle of the body should have epoxy over them. They do leak sometimes.
But Ive never had the problem.
If you clean them off first, and use good epoxy, it shouldnt come off.
But you cant put too much of a build up on it or the base wont seat back on the body.
Might require you to file some of the glue back off when you are done for a snug fit.
There isnt a lot of room in the cavity.
I WOULD NOT drill anything if this is what you are talking about.
(Sorry, had to be emphatic)