motero--

You may have found a jewel amongst the weeds. The MPG carried the best fuel economy rating of the Isuzu diesel P'ups. It did this by virtue of a 4 spd gearbox and a 3.42 rear end as compared to the more popular 5 spd with a 3.73 rear end. The 5 spd overdrive is not as efficient in 5th gear as the 4 spd is in 4th.

If all is there, I think you can probably get it running. And yes, 40 mpg is possible if driven modestly.

Paul