The Canadian F-68 equates to the F-3. The "68" is the first part of the weight rating of the truck, 6800 pounds. I've learned that there was no F-2 sold in Canada. If it had been it would have been an F-57. Rear shocks were a standard feature on F-2s in the US, and an option on F-3s in the US. Maybe also an option in Canada. Stu