Traxxas part numbers?
 

I've decided on ordering a ARTR scorpion seeing that I have radios and servos from other projects. I'm going to get the Rooster/55t motor combo to power it and already have two 4200 trinity packs on the shelf. After reading the comp build from this site I'm going to do the upgrades right out out of the box ( I cant leave any RC stock without modifying first even brand new) From what I gather the only real weak link are the center drivelines. I read about the MIP ones but the Traxxas conversion seems best. Only problem is finding the part numbers. Anyone done this mod and know what I need? Am I right in assuming that they are the only thing I need to upgrade to be able to run this bad boy?

Thanks in advance!
Ps I looked for the search button I swear!

here is the Stampede half shafts:

http://www3.towerhobbies.com/cgi-bin...?&I=LXJJ82&P=X

or

http://www3.towerhobbies.com/cgi-bin...?&I=LXJH85&P=X

Now what about the output yokes do they need to match/upgraded? I thought I read somewhere not to mismatch traxxas and axial parts?

i have ran the Axial metal yokes with the Pede shafts and have had no trouble.But here is the Traxxas yokes.

http://www3.towerhobbies.com/cgi-bin...?&I=LXJG59&P=X