mtman there are way's to do it one of them would definitely be the way highflyin said of course. The best thing to do would be to get like an .18 as the chassis will accept this engine. Probably an epic 18. You would also want to have low gears such as 11/52. Also doing this you would want to put RTR 3 Bevel gears in the diffs to strengthen them as the stock pot metal gears would probably get blown out the first time you ran it. It is possible to do but it can be a little costly.