You could always take the fan off the engine and go with an electric unit.
![](http://i5.photobucket.com/albums/y181/aceuh/DSCN0439.jpg)
The amount of drag the fan creates really drags down the power. The fan alone is good for 2-3mpg. I started out with a stock motor that had been bored .030 to restore the compression. With this setup I was getting mid 9-10mpg. I then went from points to a Pertronix ignitor and re-gapped my plugs. This helped but only a minimal amount. I then pulled the stock intake and replaced it with an Edelbrock performer. Hell the valve covers were off so I went ahead and installed Comp Cams 1.52 roller tip rockers. At this point I saw no need to install the old distributor. It was replaced with an HEI unit with an MSD coil and wires. When I put the breather back on the carb I put a taller element in it so it could breathe a wee bit better. After all this I was getting a solid 12MPG. I then installed my electric fans at the same time I put on the Vintage Air and March Performance underdrive pulleys. My mileage the last time I checked it was 14.75. By the way this is real world driving in the left lane of the interstate, running the air. I don't ease around babying it just to see what kind of MPG I can get.