Hi all, I have a Turf Tracer 60 with a 19HP Kawasaki FH-601V. What I would like to do is upgrade it to the 23 HP motor, the FH-680V and put the heavy duty air filter on it. I know these engines are very similar so my question is, is this possible with just a carb swap? Or is there internal differences like higher comp heads? Both of these engines put out the same displacement, 675. Thanks for any help you can give me.