Mack 5 tons got the ENDT-673 diesel engines. HP ratings in the low 200 (225?). I saw a Mack 5ton converted to a brush truck that starred in a tv show. The truck was mint, the ENDT sounded awesome and the truck had upgrades such as armour plate at the bottom to be able to drive hard in rough terrain without tearing everything to shreds.
The tv show managed to completely destroy the truck.
Edit:
It bugged me and I spent a couple of hours figuring out which show that was. It was called "Breaking Point" on Discovery Channel, hosted by two a**... I mean..characters.
If you have Amazon Prime, it is the last episode of Season 1.
Some pictures:
Too bad about a nice, rust free truck in perfect running condition, destroyed for absolutely no good reason.