it's all about the torque you're putting through it. If you baby it and be nice.. might stand up to your combo just fine... If you put slicks on out back and powershift the crap outa every stretch of 1320 you can find, prolly won't last a week. Theres a lot of variables that have to be factored into an answer to "How much power can my transmission take?" You could make a 500hp motor work with a t-5 if you were careful about your driving style, tire selection and shifting strategy, or you could throw a bunch of weight in the trunk, hook up a pair of slicks, rev it to 6k, sidestep the clutch and grenade the whole thing... Keep in mind your vehicles weight has a lot to do with transmission life too... 200hp and a screwdriver might work for a skateboard if you design it right... 3000 pounds later, and your screwdriver transmission might have a problem...