I believe that they used the same engine as the Dakota in the last years of the D/W body style. Our Dakota has a 3.9L V6- it's basically a 318 with two cylinders lobbed off. Yours looks like our engine (I believe that it comes out to 239cid, but don't bet the farm on it). Great engine!

Is that a half ton or a 3/4 ton? I can't tell from the angles....



Looks like a nice truck!