You can, but to swap carbs, you also need to swap the throttle cables out for ones off of a 75f, or 70-76k and the carb mounting rubbers for the earlier carbs. You'll also need to slightly reroute the fuel line, and turn the petcock on the tank 45 degrees, if you have the petcock where the outlet points out the back. Otherwise the fuel line will interefere with the earlier carbs choke lever, and you wont be able to fully close the choke. If you have the petcock where the outlets are on the bottom, then you can leave it as is. You may have to rejet as well...