I can only assume that you want to swap the rubber belt that connects the crank to the cams with a chain..... If that is what you mean, I haven't heard of anyone attempting such a thing, for many reasons.
Don't be too concerned about it though... you'll have much larger problems with the engine before the timing belt becomes a concern. I'd be willing to bet that you'll punch a hole in the side of the block before the timing belt ever becomes a concern.
Not that I condone it, or am personally involved in "drifting" at all.... but even being stock, the S197 puts a good amount of power to the wheels. Most of those drifting competetion are just for show. You'd likely be better off modifying the suspension than adding power. Spinning the tires and making smoke is not an issue in this car. Keeping it sideways in a corner can be. Look more to the suspension than the motor. Not to say that more power is not always better.... but in your case, I don't think you'll really need that much more to compete.