Where does it connect? Directly to the intake with the aid of a splitter or to the base of a carburetor?
On my 78, I've always had it connected directly to the intake, but today I drove it from Boise to Meridian with it connected to the base of the carburetor and it ran just fine! I had to bump up the curb idle and make it run a bit more rich, but it doesn't smell like unburnt gas anymore when idling, and actually idles BETTER than it did when connected to the base of the carburetor!
Next question, at idle, should the distributor be advanced AT ALL when idling? When I rev the motor it pulls the arm on the vacuum advance valve that's connected to the distributor, but at idle it stays stationary, is this normal?
I also noticed a little more of a "pinging" sound in the catalytic converter shell now that it is connected to the carburetor base. Not like an engine ping, more like a mis/backfire, and it definitely isn't coming from the motor, it's in the exhaust system.
Below are pictures I took of where I have mine connected to the base of the carburetor right now.