Believe it or not, Jack is building three of these monsters at once. Also a FC-150 is on his agenda, but he was not able to bring it to this year's event. This M-677 was bought from Jesse and Jack is going all out on it. This one is powered by a Duramax Diesel, an Allison automatic, and a 205 case. 44HD and a 14 bolt rear end with 4.10 gear get it rolling. It also has 37x13.50-17 Toyo M/T Open Country tires. Here are some other features of this unique truck.