As novaderrick suggests, Q-jet secondaries are opening too quick.
The adjustment is pretty simple,
1. Look at the pass side of carb,
2. In the upper left hand corner, there will be a slott for a 3/16 in flat screwdriver.
3. Underneath, pointing down is a 3/32 allen screw, this clamps the spring.
4. Loosen the clamp screw,
5. Slowly turn spring wrap-up screw CCW until the tension is released. DO NOT try to go further.
6. Now, slowly turn CW, usually 1 complete turn, tighten clamp screw.
7. Check for bog, if still there, continue to turn CW, tighter spring, in 1/4 turn increments until bog goes away.
The above procedure slows the opening of the air doors to lift the rods up out from their respective jets to provide extra fuel on engine's demand. The throttle plates are opened, but, until the engine develops enough air flow through the secondaries, air doors are closed. Then as rpm's increase, air speed increases, and doors open, more fuel given, mo power!
I always had a bog, a consistent bog, on two early Camaro's I owned. After adjusting, I dropped 60' times from 1.9's to 1.6's.