who is running a stock slant six

This is my '73 Dart prior to selling. The engine was pretty much stock. I changed the exhaust manifold for a larger one that mated up better with the 2¼ inch exhaust system. I ran the 1 bbl Holley 1945 the entire time. The car was showing signs of running rich, so I re-jetted the carb.

The exhaust manifold did not have a heat riser for the carburetor nor a pocket for the choke to sit in. The lack of the heat riser meant I had to go in a remove all traces of the EGR. EGR elimination consisted of plugging the vacuum line at the carb, plugging the floor of the intake manifold, and removing the EGR valve. I modified the choke spring assembly so it was suspended over one of the exhaust runners.

The engine had over 120k on it and used a quart every 1200 miles. Because I ride a scooter for round town stuff, this car saw mostly road trips. The mods raised on-the-road mileage to around 25 mpg (top speed up to 80 mph). In town was around 16 mpg. The car ran more smoothly sooner after taking out the EGR than with EGR installed.

Unless you know what you're looking at the mods are invisible. Except for the exhaust manifold, it was cheap. The original pipes were rotted out, so I was going to have to replace them anyway.