THunderjet
Actually it's a little more complicated than drilling two holes in the carb and bowl.
You'll need drill press, bits, and taps to make it work. It comes with instructions, but doing it with a hand drill and no clamping mechanism will be difficult.
I would find an Indy shop that sells and installs them. Take the carb off and take it in with the Thunderjet and it usually can be done the same day. It will take about 2 hours to install, you have to drill out the air bleed and put in a air bleed jet, and some mods to the body of the carb must be made for proper function.
Also they make a significant difference on the S&S carbs, you'd wonder why S&S doesn't do this on all Super carbs. It really helps from mid to top end by adding fuel.