I know of a kid that has a 6spd manual ford and beats the crap out of it and it hasn't broke yet. Im pretty sure that the Torqshift is the same as the allison. I also know of a seriosuly modified ram, I don't know the specifics, but it runs 11's. =o
Watch out for the first generation duramax. Im pretty sure they have head gasket/ head issues. The Allison transmissions in the chevy/gmc can take a beating. I think the Fords have the Allison too, but call it a different name.
