If it fits and the linkage works then go for it. I have no problems doing it at all like that. Some engines can be a huge pain trying to get the throttle linkage all worked out OK. But unlike glow engines the gasoline engines tend to be fairly clean burning so there isn't a mess of oil residue to have to deal with after flying a gasser plane for the day. Thus the servo isn't getting all oiled up from the exhaust residue.