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
Got me a NEW Project
1970 GTX 440+6, 4 spd, 4.10 Dana and N96 FE5 (top/bottom) and black bucket interior.
Original transmission and Dana - Engine is a service replacement block.
Body has all stamped #s + VIN/TRIM tag and door sticker. Been hunting like all hell to find the Build Sheet.
garage find, only had 41,850 miles on ODO.
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