same here...my classic is 358hp on a rebuilt 5 speed DCCD with taller 5th gear, but it's at it's absolute limit..if not a little bit beyond it...I'm not a clumsy driver, nor was the previous owner (who had all the work done) so it's fine, but the thought of a 6 speed low ratio JDM DCCD and 400+ keeps me awake at night.