i have converted 2 mugen mbx-5s, one truggy and one buggy. Here's is a pic of my truggy..
I am running a 1520 castle motor and mmm esc on 5s and it rips. So much so that I have blown 2 diffs apart. I forgot to re-shim them after the conversion. After you do the conversion, you MUST re-shim the diffs or you will blow up a set. I personally would buy either a Tekin set up or a Castle set up or some combination of both for your rig. Much better components IMO than what you have listed.
I am using a RC monster motor mount and RC Monster custom battery tray.
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