well i have nothing bad to say about centerforce clutchs they are amazing ive had 3 of them in each of my different vehicles. but they were more of a fast im a race car driver cars lol. i was also thinking of upgrading my 4.0l clutch but i heard the zoom clutches are indestructible and are best for use during towing. and from what ive read zoom clutches can definitely take the beating. but if you get the centerforce let me know how it works out.