I found an RC airboat at garage sale. It has a nitro engine that the seller claims has never been used and has been sitting in a closet for the last 10 years or so, but she couldnt tell me anything else about it. I have no experience with nitro RC's, but I really want to buy something to throw this engine into (have been looking at monster trucks for a while now). The engine says "gp" on one side, and "40" on the other. It looks like an airplane engine and has a prop mounted on it for the airboat. Can anybody tell me if I can use this thing in a truck or if it is too big/small/etc?