Yep, the truck has a 9.2L (555 CI) Cummins V-8 diesel engine hooked up to a 4 speed Allison automatic tranny (soon to be replaced with a 5 speed auto) and that is how it came from the factory. It's a 1975 Dodge XCNT800 tanker truck with a 58,000 pound GVWR. Below are a few links to some pics of it. The first shot shows the truck as it was when the seller I got it from first acquired it. Since then he has removed the tank and the truck now looks like what is seen in the second and third pictures.
Since I can't have a truck that long in the base housing unit I am in I most likely will end up cutting about 12 to 14 feet of frame off the back and putting a single rear axle under it. Don't know yet whether I will put a flatbed on it or a fifth wheel plate and make a tractor out of it. After that I might look in to replacing the Cummins 555 with a turbo'd Cat 3208 for even more power. The Cat 3208 is what replaced the Cat 1150/1160 engine that Dodge used from 1973 to 1975.
Ruppster