First and foremost you are going to need deeeeeeeeep pockets. As near as I can figure I'm in over $2200 so far between the kit (about $1050 there) and repaires (about $1150ish so far). you're also gonna have to have RPM everything they make for it. You'll need an aftermarket Gear case that can be dremeled out to accommodate the 1/8 scale motor. Most guys use the Integy one, I used one from Hot Racing. Either one should be fine. You'll need a good wheelie bar for the back....not so much for wheelies but to protect your 2200kv when you wreck. Check out tbone wheelie bar. thats a pretty durable and wide wheelie bar...offers good protection. Then you are going to need a set of 17MM hub adapters. You'll need either a full set of GRP tires or Ipanemas. If you go with the Ipanemas get the 41MM tires all the way around. Dont use the 49MM ones in the rear. the 49MMs dont hold up quite as well at high speeds as the 41MMs. Also if you get Ipanemas get a harder shore like 55 or 60 and if you have to use some traction compound on them if the weather is cooler. I'm still trying to determine which tires I like better. Still unsure at this point. You'll need a 6S lipo (at least one....I've lost one 6S lipo and one 4S pack so far from wrecks). You'll need a 34 or 36T revo 3.3 spur and a 34T XO-1 Pinion. You'll need some after market aluminum shocks and TiNi shafts. I use the Traxxas big bores myself. You'll want to look up how to do the wide mod to the front end of the Rusty, Gyro is optional. some people use them some dont. You'll need 1/4g lead weights backed with adhesive tape. I buy mine from a local auto garage. Lets see, I would suggest getting a very high speed servo. something in the .8 sec ballpark. You'll also need an aluminum bulkhead. I relace the stock axles with the heavy duty ones from the 4WD Slash. and if you're pockets are deep enough Id consider buying ceramic bearing for the wheels, transmission and spur gear. Charger doesn't matter to much as long as it can charge 6S lipos although you'll probably want a 200W or higher charger that can charge the 6S pack at 10A or more. You'll also want to get one thats decent quality. I had one of those cheapie chargers go bad on me and puffed 3 or 4 of my lipos before I figured out what was causing it. Thats about all I can think of at the moment. You can take a look at my build
100+ MPH High Speed Rustler 2.2 - YouTube Id also check out builds by some of the other guys that do 100+MPH Rustlers on youtube like JohnracerX, MrMRTMustang, Absoloot1, Draven, and any others you can find. I'm still working on my build but I believe i have identified the problem I'm having....I think the combination of the weight I have and the Downforce wing in the front is to much and when it gets up to speed its putting so much downforce on the front that the back looses traction and skids out of control. Next time I'm going to ditch the downforce wing and try putting some more weight in the center and rear of the kit.
Hope this helps.