Umm all the mass and weight is up front. Its there because in a drift car thats where you want the rotation point to be. In a road race car you want weight in the center as much as possible.

A high bias in either direction will cause the car to over/under steer. This setup is a killer over steer setup. I mean theres a reason they call it a "drifting" setup.

Also the long cast steel prop shaft is perfect for braking. the small ones brake all the time with a strong motor due to the lash that develops in the driveline after a few runs.

In terms of ballance, this cars all wrong for racing. In terms of drift its purpose built for it. and to throw 200$ at that is amazingly obsurd on a car thats meant for the ass end to brake loose, for 260$ you can buy a near pro level race car made to handle good. (FW-05R, MXT3, etc... )

Looking at it again, the amount that the ass end breaks loose will increase as teh run goes because the only real balast in the back of the car is the fuel. Also the exposed servo haning off the side of the chassis is asking for parking lot bashing to take it out. Oh and the reciever pack being mid car also doesnt help the ballance of the majority of the mass being at the centerline and forward. The majority of the mass of the engine is forward also.

You can fix it with lead weights but at that point you will make the car just a lumbering tank.

The long exhaust header also will kill torque on the plant acting as a pipe tuned for rpm.