Congratulations, you've got a great truck. So far I've done the following to my rustler:

3.3 Engine
Aluminum top plate
Aluminum front and rear shock towers
Alumimum Rims
Aluminum Shocks
Steel Output Yokes (They finally came in stock after about 4 months of waiting)
Steel Roll Bar/Brace
Dirt Hawg tires
Switched the radio gear for an Airtronics set
Crowd Pleaser Body
In line fuel filter
Venom Fail Safe
Venom Hump Pack
Jato Wheelie Bar (Broke within a month, gonna try an aluminum one next)

I'll be doing the bulkheads and extended aluminum arms within the next month.... I know what your thinking, alot of aluminum, but as overpowered as the 3.3 is I need all the weight I can get just to keep it on 2 wheels.