My evader does wheelies so high it flips because it's all back heave. I want to order Proline 2.2 inch offroad rear tires to place on the front of the truck. Do you think this'll help or raise my center of gravity and make it worse?

adjust the slipper clutch properly[:-]

A heavier tire will help keep the front down. It will dramatically change how the truck handles in the air too. Changing the ride height, and dampening will do much for handling. If all else fails, you could put some weights on the front of the truck.

i'd put weights on the front and/or a wheelie bar in the back. They have the adjustable wheelie bars than you can move up so it doens't touch the ground when you're bashing around

loosen your slipper...

get lower gearing so you dont have as much accaleration but you have tons of top speed
and all the above works too