Pulling behind other trucks

[Running rough]

Sorry my bad, yes I ment the mp8, I talked to the boss at a local truck wreaker used parts ect., and asked him if the hype is true, that the paccar mx is a low rpm engine, and pulls like a cat, he told me, bunch of ballony, it doesn't pull anywhere near as good as a simuler hp cat and that the isx is still a far better choice for a power plant, despite its well known issues