My Brushless FLM build

looking at running a pair of these...

http://www.amainhobbies.com/product_...rce=google_ext

when they say taller I'm thinking it doesn't matter for me because im installing in a FLM chassis and have plenty of room, am i missing something i would love these to fit so i can order them up.

i'll be running plenty of battery, ended up ditching my gens ace and buying 6 turnigy nano-techs as seen here http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html