Gear Swap to 2.94s If you have the 8 3/4 rear housing along with the 1406 Edelbrock 4 bbl carb will get you to 20 mpg. Can use the Mr. Gasket 2 to 4 bbl intake manifold adapter, then the intake manifold ports still match the 318 head ports. It's all about smooth port flow and port velocity with these 318s for efficiency and power.
You will be surprised how nicely the 2.94s pull, the tone of the engine will deepen with the 4 bbl on it. Also you will have the secondaries of the 4 bbl to play with when you need more power and excitment.
Works great for me driving around getting to where I am going, great freeway cruising with power to pass other vehicles. Really like the added secondaries of the 4 bbl.
Stock 318, Added 4 bbl carb, 727, 2.94s
One other performance and milage trick is to put on the 100 % light Aluminum Torq Thrust Wheels they are about 20 lbs lighter per wheel than the steel wheels. That is a total of 80 lbs less in rotating mass that you have to spin up every time you take off.
Surprisingly it even brakes easier too because of this.
Happy Cruising . . .
