You will need a new chain, the new gears will need a longer chain may as well get yourself a kmc 610 or kmc kool while your replacing it then you'll have a good relable chain too.
second that n the forks some tall alloy trial forks like inspired elements. Or trialtech ones would make it better for tgs or pure trials, thou if you are planning a more street style you may be better looking into some light sus forks, if you like front suspension on you trial bike