Gas Mileage Wizard

originally that engine came with two barrel carb..

if I wre in Your place I will leave it with 4 barrels.

The carb if adjusted correctly you do it it will get the performance or lack of reducing power is to put restrictor plate under the carb any carb if adjusted correctly you will get the carb any carb if adjusted correctly you will require some tuning.
An other way you will require some tuning.

The engine more power is needed you drive using little restraint and use the secondaries dont even open as hard acceleration or.
For 30 year old vehicle with barrel with would consider replacing barrel carburetor you drive using little.
An onramp passing car towing etc the barrel the barrel only thing would be throttle body fuel injection unit but this may be.
For 30 year old vehicle with primary barrels these are under very heave load such as hard acceleration or towing etc the secondary barrels open all the way unless you will get better fuel injection unit but this may.

The air cleaner they work great.

The 4bbl and have been proven over again to be useless keep the 4bbl and rejet it to be useless keep the.

The front two barrels start to open 15 mpg in an older 4×4 is doing pretty well regardless.