I just happend to measure a bunch of things from my boat
She is going to a new home tomorrow so I wanted to record some of the more important mass centers.
my boat has two 55gallon tanks, the first one starts at 66" forward of the transom (measured from cap/transom). that tank is 48" long, then there is a space/frame then the second (same size tank). My boat has a F250 yamaha on a bracket. I estiamte the center of the fuel mass (both tanks full) would be about 110" forward from the transom (measured from top of cap)
I also moved my console forward. Backside of the console is 102" forward.
With both tanks full, the forwad ice holds full, and no water in the boat well (50gallons located in leaning post), I woudl say she is just barely bow heavy while on plane, but on the other hand she stays up on plane better.
With only the rear tank full, you can run as fast as you want without any funny behavior from being bow heavy.
If you cant move your console, then I would move the tank up at least couple feet, and 3' will probably not hurt you
http://gallery.bateau2.com/albums/us..._shine_208.jpg