You will have to use the muffler and manifold, and stub shaft off of your original engine. Note if you use the 356447 engine, you can remove the regulator and use your current one if yours has the 16 amp charging system on it. Also The flywheel fan and shroud is 1-3/8" thicker on this engine than the 350447 series. If this is a problem for you the parts off of your original engine would work on it.
