true but it is the torque associated hige power engines that do the damage the box will probably cope but standard gears wont last to long especially 3rd gear which gets all the torque sent through it thats why quite a comman upgrade is normal 1st,4th and 5th with straight cut 2nd and 3rd where most of the torque is transfered through the box.
Plus it would also depend on weather it a 2wd or 4b box i assume it a 2wd as you not mentioned diffs.