The fusion exceed you've got there is pretty mental, the motor is (I think) 7200kv or there abouts. It's insane in the DEX410, so should be plenty quick enough in the DESC. Just need to play with pinion sizes. Think the DESC comes with both mod1 and 48dp spurs, so you'll be able to use either a buggy motor or an SC motor.
Only issue I can think of is that I don't *think* the DESC will take anything other than 2s saddles, so going for low kv motors and hoping to use 3 or 4 cell may well leave you with a rather slow car.
One down side with the exceed pro is that it doesn't run particularly cool. It needs a fan. Definitely does in a DEX, so I can't see it not needing one in the DESC!
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