1970 440 six pack outboard carb question...

Hi guys, I was wondering if these air bleeds on the outboard 440 six pack butterflies were original? I have three outboard carbs, and all have the same holes in the same locations??? Thanks!

I believe so.

I think it was to work with the idle circuit mixture. they are almost right above where the bleed needles come out.

Also -
I would imagine that you would want the butterflies completely shut at idle and without the holes you would not have any bleed air for the idle circuit.

Bill

Yeah, I thought that they looked a little too centered as far as location ... I don't see anyone taking that much time to measure the hole locations so perfect..

They're all in the same place.

Awesome! Thanks for the info!