first of all a 7mill cub should pull from the tourque away from u second the setup is soo huge lets start with your carb...ur runnin 2into one,,JUNK,, u should be runnin 2 38mms,,tires..u should be runnin at least 10 paddles 72in rollout extremes or superlites, shaws help over stock shock to get out of the hole!!!!! drag frame matters over stock frame.OVERIDE tranny over stock is huge, lockup with r1 clutches not slipping over yours might be slipping, alky over gas,,, pingel valve,.lightness,, he could be lighther!! all this stuff matters and is needed,, like i said your setup might not be drag enough,,