In the mid 1980's, Allied Ready-Mix of Richmond B.C. wanted to increase their carrying capacity per truck and overall productivity. Allied talked to other manufactures but none of them were willing to interrupt their production lines to make a special tandem-steer truck.
Pacific Truck and Trailer was very keen to work with them and designed a truck specially suited to local conditions. In 1987 Allied ordered and received a tandem-steer truck, largely based on a P-510-S model. Wayne Magee of Pacific Truck and Trailer was the key man involved in designing this truck, 400 Cummins and Fuller 14708LL. This combination worked out even better than Wayne had planned.
Pacific's being incredibly well built, Allied was hoping they won't need replacing for at least 15 years. Compared to 10 years for the other trucks in their fleet. Pacific built 4 trucks for Allied Ready-Mix, with 10.4 cubic meter mixers and a booster axle. As of December 2008 all 4 Pacific trucks are still in use, Allied still has a 1988 Pacific in their fleet and the 3 other trucks have been sold and still in use.
Tyler Thorson from Allied says that their Pacific trucks were the best and longest lasting trucks they have ever had.