How big is the cargo area in a 102?

[Jerry32]

I  am interested in getting a 102 with a 8V92T when I get home in a month from now and was trying to plan some of the tanks I would want to put in. What is the height from the the floor of the cargo compartment to the keel in the center? Maybe if I am lucky I will find a bus I can afford. Mak keeps saying he will have one soon so will have to wait and see. 
Jerry