the board you have will be stable at speed and sluggish at all other times.
if you are gonna ride park, you'll need to be super aggressive. that set up sounds good for frsh powder days on the steeps and deeps.
for me, doing silly tricky stuff, i have a 159; and when the snow gods smile i have a 166.... i am not much lighter or shorter than you.
you will need to adjust to your set up, but you'll be fine (and exhausted!