T-maxx HV Direct to diff conversion... have truck need help on elecs

[BL_RV0]

My ideas for the setup are:
this motor
http://www.hobbycity.com/hobbycity/s...idProduct=4570
this esc
http://www.hobbycity.com/hobbycity/s...idProduct=6550
with
http://www.hobbycity.com/hobbycity/s...idProduct=2169
http://www.hobbycity.com/hobbycity/s...idProduct=6320
and 2 of these, in series
http://www.hobbycity.com/hobbycity/s...idProduct=6428

What do you guys think?
Here's what I got when I plugged it all in:

Differential Ratio: 2.8461538461538463
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 1
Pinion Tooth Count: 1
Total Voltage: 37
Motor KV: 215
Tire Diameter (inches): 6.5
Tire Ballooning (inches): 0
Motor Current Draw: 80
Motor coil Ω: 0
Spur/Pinion Ratio: 1 : 1
Total Ratio: 2.84615 : 1
Tire Circumference (inches): 20.42 inches (518.68 mm)
Total Motor Speed: 7955 RPM
Vehicle Speed: 54.05 mph (86.82 km/h)
Effective Speed Rate: 1.46 mph/V (2.35 kmh/V)
Estimated Adjusted Speed: 50 mph (81 km/h) - 7% loss
Effective KV Value: 215
Motor Torque: 2.62 ft-lbs
Final Torque: 7.46 ft-lbs
Final Power: 2960 watts (4 HP)