If the engine is in good mechanical condition it should be fine to run and you could expect reasonable service from it. If you should ever need replacement parts .... we know that won't happen. If the engine has been stored in a reasonable environment, the ignition should still be OK and even if not, any standard CM-6 RCexl or RCXP ignition would work fine. The carb may or may not be OK after setting for several years and you should open and inspect it. Look for pliable diaphragms and if stiff, install a rebuild kit for about $10.00. You'll probably get more value from the engine by using it as they don't have much resale value these days.