Thanks for all the replys. I am going to order that run-in test set from novarossi and see what I can do with it. I may also try to rig something up using the standard flywheel,clutch and clutch bell setup to a spur gear on a lock center differential and attatching a prop to a driveshaft somehow. I have abunch if soare parts from an 8ight 2.0 buggy that I am pretty sure will work. If I go that route I won't have to wory about the prop getting anywhere near the carb, and the prop won't be directing airflow over the engine so i will be able to get it up to proper operating temps.

Also I'm not nessassrily doing tis for break-in. I am wanting to test different engines to see the rpm potential of each engine and by running diffeent props I will be able to determine how much power different engines have relative to each other.

Thanks