Strictly from memory, most of the untouched intakes I've removed over the years had the studded 3, sometimes 4 bolts in the first 2 holes on each head. Two on the passenger side for holding A/C dipstick brace/bracket. On the drivers side there was at least one and sometimes 2 studded bolts. I think one maybe attached to a tin wire loom behind the alternator.
The studded bolts were present even if the car was non A/C equipped. The shorter flange headed bolts were used where they didn't hold throttle brackets the slightly longer bolts held the throttle cable bracket at the rear of the drivers side head.
All from memory, but that's what I recall having turned wrenches on these cars when they were less than 10 years old, and daily drivers.
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Brad Yost
1973 T/A (SOLD)
2005 GTO
1984 Grand Prix
100% Pontiacs in my driveway!!! What's in your driveway?
If you don't take some of the RACETRACK home with you, Ya got cheated 
  
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