stock 318 won't start

I have a 1972 Swinger with the stock 318 and column-shifted 3 speed automatic that used to be my daily driver years ago. Now when I try to start the car, it turns over, but will not catch. I couldn't smell gas when trying to start it, so I figured it was a fuel system problem. I changed the spark plugs (never hurts) and replaced the fuel filter and fuel pump with aftermarket replacements for the stock items (not upgrades or performance parts, just stock replacements). I also did a quick-fix to the carb linkage (something fell off, so I replaced the missing piece with a nut & bolt - cheesy, but it works now). I haven't touched the carb itself. Battery power is good, and the car has an orange box Mopar electronic ignition installed by the previous owner. Now there is fuel, and the car turns over, but it still won't start. I'm about out of ideas what to do next (besides have it towed to a shop) - any suggestions?