Interestingly, I have a 71 Charger R/T, U code, Ramcharger Hood car with both holes factory drilled. 3/4 inch for each hole. Factory paint around edges of both holes. Still can't figure out why the one to the right of the Ramcharger hose hole was drilled on a non-Hemi car. August 1970 built car so who knows, maybe it was an error. I know that probably doesn't help you much but I have seen a few 71 Hemi Chargers during restoration and I noted that the choke cable hole was larger than the Ramcharger hose hole. I also noticed that a couple of the cars have the different sized holes factory drilled in opposite locations.