Help!!!!

They drill out pretty easy. I'd start with a 1/4" and try an easy-out. If no-go, just slowly increase the drill size until you can run a pipe tap into the hole to clear it. If you got some universal temp gauge that has too big a sender, remove the heater hose nipple out of the intake and add a "t" pipe fitting of the proper size and install the sender in it. There is no filter inside a Carter carb. I don't remember seeing one in a Stromberg or Holley either for that matter. In fact, The only one that comes to mind with an internal filter is the Rochester and it's just inside the inlet fitting. You don't have to dismantle the whole carb to get to it.