I have been watching this thread for a few days and the confusion it is causing me makes me want to ask;
You have a fuel system that is running so rich that fumes are drawn into the passenger compartment? If so, an EVAP (or similiar) system is not going to help much. EVAP is designed to contain fuel vapors while the car is off and then burns the excess fumes while running.
Is the engine carbureted or injected? For a EVAP to work anywheres efficiently, you will need at the least closed air cleaner(s). EVAP also vents the fuel tank and carburetor bowls.
It sounds to me that either the fuel mixture needs to be leaned out or the passenger compartment needs to be sealed more tightly (exhaust pipes run to rear bumper?). Is this a steel car or fiberglass?
Now all of this having being said, early cannisters (metal) used a replacement filter and later cannisters are plastic throw away.