what are these for in this intake

[brianhouchins]

What I have is a 1972 engine that has an Edelbrock 440 performerintake when I pulled the carb off I found two holes. One inside each plenum I don’tknow how or why they are there. Now I have never heard the engine run and I got the whole thing in a trade deal. I think they go into the EGR passage but not 100 % positive can anyone please tell me how and why they are there. Thank you very much

 

[440roadrunner]

EGR is right. If you don't need EGR to pass any smog checks in your area, I'd ream them for a 1/8 pipe tap and plug em

 

[Meep-Meep]

Yep, EGR. I see it has plugs on the pad outside the plenum and those should work just fine.