I came across two OS 40 H engines at an estate sale. They are old models without bolt on mufflers. Both are new in the box and the instructions indicate they were "racing engines'. The information material also said they produce the power of a 50 to 55 two stroke. Does anyone have any information regarding these engines? Hate to just let them go. The OS 703 strap on muffler fits so that shouldn't be a noise probles. Thanks for the help.