Replying to Just got new skis - Dope deal or bust?

I just got my first true park skis: Armada ARV '86s. However, I got the 170 because they were essentially 50% off with bindings on Craigslist and couldn't pass it up. After I got them and looked at them, they come up to just below my chin and am worried they are a little too small.
My specs: 180lbs 6'1''
What do you all think? Im pretty new to park skiing and wanted to really get into it next year without grinding up my all mountain skis.