67 350 w/ Powerglide. All original components - Rochester 4 bbl carb. Was originally equipped with the CA smog equipment, but that is not installed today.
When I accelerate at a "normal" rate, the car behaves fine. When I accelerate quickly, the car bogs. If I keep the pedal down, it will die. I just pulled the air cleaner off and was playing with the carb a bit. I noticed that when I accelerated, I heard a very loud vacuum leak/release (not audible inside the cab). When I accelerated slowly ("normal"), there was no vacuum leak/release. I know nothing about carbs, so maybe this is normal. I couldn't locate exactly where the vacuum leak/release was coming from, so I couldn't plug it and see what happened.
I don't mind buying a book and trying to do work myself (I've always wanted to learn about carburetors), but just thought I'd ask if this symptom rings any bells among the experts here.