Don't do that! 48 pitch gears will STRIP using that 1410 motor your talking about getting. You were on the right track with the 62 spur...just dial it back to 15 teeth on the pinion and you'll be in the 'sweet spot'.

Vegatron has been running the 1410 (3800kv) motor w/MMP since the truck came out and he wins ALL THE TIME. Trust me, his truck is just as fast as anybody else's truck at our track. It's a small-ish (78x50) tight indoor, smooth high-traction track. With 15/62 I can clear ANY jump on the track just by 'blipping' the throttle with literally NO run-up. Plenty of grunt and I haven't stripped a single spur since getting my 1410/MMP.

I DID however strip 2 48-pitch spurs with several different 540 motors AND dealt with major HEAT problems when I was trying (unsuccessully) to run various small can motors. Trust me, you DO NOT want to go 48-pitch with the 1410! Way too much GRUNT (torque) for that.

For pinions just get Traxxas/Slash pinions from your LHS. They are 32-pitch, and cheap.