Park Ski Length

I am new to Park Skiing. I am a snowboarder and did ski a lot when I was young. Note, I am pretty old ;)

After a lot of research and a lot of help from you guys, I decided to get Line Blend ski's. I decided on 174's, but just found out they don't come in that length. They are 171 or 178.

My main priority is for the Park. I will sacrifice on the all mountain stuff. Jumps and rails.

While the park stuff is new to me on Skis, I can ride park on a snowboard. Also I can do rails on quad skates and inlines.

I will never go super big on jumps or get too crazy on rails.

I am:

185+ POUNDS
6' TALL
SKIING STYLE: Intermediate, casual, fun, park

CHOICES: 171cm or 178cm

I will center mount the binding.

I am leaning towards the 178's.

They are both in stock at my local shop. Going to pick them up today ;)

If it matters, I have some dalbello boots.

Thanks for any responses.
Ben.