[suicideneil]

That does look like a big truck. Im gonna say go with the 9xl motor (feigao/wanderer/nemesis), 2x 7cell packs, and the MM esc with the bec disabled (remove red wire from rx lead and run your rx pack to power the radio & servos). You should be able to make back alot of money from selling the nitro parts -engine, tank, exhaust etc) to help cover the conversion costs. The only tricky part will be motor mount, but Im sure Serum and several other guys can help you with that.

As for where to buy from- the RCM store has everything you need pretty much, or ebay is a good place too yeah, though there is no after sales help if something goes pop.