Bing board dimensions question

Ok, so my goal is to make a long/funboard for my gf that I am going to enjoy surfing too.

http://www.classicbingsurfboards.com/images/600_Bing-Models.jpg

Second one from the right. We’ve cut out a rough outline, but I wanted to get someone’s ideas on dimensions and things of that nature. I got a big 8 foot blank with plenty of foam and I’ll be shaping it this weekend. Any ideas would be great. Also, what would be your recommendations of fin placement on this guy? It’s going to be a single fin.

Aloha

Bryan