Truck with225 and od trans

[gremlin]

I'm going to look at an 83 Dodge truck with a 225 and a 4 speed od trans. Anybody have an idea what kinda mileage they get?

 

[1966 dart wagon]

well its really hard to tell, and in a truck it may drop a lil due to its not areodynamic(sp?) but the od helps, my /6 wagon got 13mpg with a manual 3 speed it was horrible, and some get 25mpg+ id say anywhere between 15-20mpg, also my engine was tired measured 90-120-120-120-120-120