$350 & 3 R/C's... "What To Get"

[Takedown]

Ok I have 3 R/C's that need work and I need your guys help so that I can finally choose what to get with this money. I have a Decked out Cen Matrix with almost all the factory racing upgrades for it, all it needs is one of Mikes Cen custom center diff mounts. I have an older version E-maxx that needs a tranny and maybe a new chassis due to mods that didnt turn out and a Warhead that needs new cvd pins, a front center dogbone, maybe new tires, a body and some other stuff. I would like to spend this money on power upgrades such as lipo/brushless stuff. Got any suggestions...