I saw the same auction as you and at first I thought that is just what I want because I want to replace the engine right away anyway. Here comes the but part. If you buy an engine and I would guess you would want a good one like I would want it is going to cost around $150-$200 and that's without a pipe then you have to buy the wheels and tires add another $75 or so then you still need a body $25! A grand total of $300! I say just buy a whole new Revo and sell the engine if you don't want the stocker and replace it with what ever it is you want. You can sell a 2.5R for around $120+ if you don't run it and sell it as new.