Yes, you should get new pinions too. It seems that 64 pitch is much more standard (at least in the US) and you can find gears much easier. I switched over completely escpecially since I use 64p on my 1/12 scale too.
tzotzo, I understand the standard swaybars are medium (yellow) front and rear. Visually they look the same though I cannot measure with my calipers because the layer of paint makes it a little different, eh?