As I am sure that you will read, you can spend quite a bit on a conversion. You get what you pay for so shop wisely. I have converted 3 vehicles over and love them all...one being an 1/8 scale mugen. As Neil stated above, Mike sells everything you need for your conversion.
If you plan on running the v3 MMM esc, you shouldn't need a ccbec, although it wouldn't hurt if you used it.
One suggestion,
BUY QUALITY BATTERIES! Good batteries do make a big difference on how your system performs. Mike sells may different configurations in may different price ranges.
The Hyperion line of chargers are widely used by many here and well liked....I own one one and love it.
Best of luck and welcome to the forums!
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S