carb problems?

I do not know how much smog control crap is on the '74 /6, but I know the newer ones (80's) had all sorts of **** all over them. One line was connected to the charcoal canister, and when the filter inside the canister would begin to fall apart, the carburetor would suck bits of it in. This caused ALL SORTS of driveability problems which were really hard to chase down; they would appear, disappear and re-appear, seemingly at random intervals.
Often the carb would need a rebuild and a pro-fuel or similar type fuel filter would have to be installed in the emissions line to capture any wayward particulate matter intent on corrupting the carb.