If you want quality then go with the TEKNO upgrades:
https://www.teknorc.com/product-vehicle/slash_4x4/
Warning, once you see the quality of their parts you will wish you bought a TEKNO SCT410 in the first place, more info here...
Yes, it will "work", but your balance will be slightly off and I suspect you might feel a slight amount of "torque steer" as the side with less rotating mass will tend to pull faster on that side. Chances are you may not feel any difference if just bashing around the yard, but it may be...