Center diff in emaxx help needed

[twisted8]

i have a center diff in my emaxx and ive run the truck and the front end is unloading more then i would like BUT when i go into a corner and nail the throttle it still wants to pull the front end up....

im running a mmm 2200 combo geared at 19/68, the throttle curve is adjusted so that i have a smoother start, then the power comes on gradually. im running 2 5000mah 28c 2c lipos. diffs are , 60 front,500k/100k or what ever it comes with from the factory in the center and 30 rear.
also running badland tires.

truck handles pretty good but i need the wheelie action to decrease a bit. my friend is convinced if i put the solid center back in that will cure it and i tell him that it will make the wheelies worst.

any ideas ?