I have a HDA-45A on my 61cc husky chain saw conversion.The only problem is if your going to use it as a saw the throttle linkage might not be the same.You could also use the carb off of a G62.When you look in the intake youll see a stamped number.Mine has a number 42 wich is the venturi size in 64ths of an inch.Are you gonna use it as a saw or RC engine.If a saw i could give ya a few saw shops to check out that i purchase from,send me a pm if needed.