If it's possible not sure what nitro he is running. But can also just change the flywheel and clutch to fit and make the 3shoe fit and work. If he can do that. And has the tools to do so..
Well it really comes down to the engine size. Not so much the scale of rc. The .12 - .18 engines will be running the 2 shoe clutch. And the
.18 - +. Will be running the 3 shoe clutch. Almost all clutch bells are a mod .1 gearing or pitch.. You can measure them to figure out what you have . To...