The muffler is a JA Peacekeeper for a Zenoah G 62 and I only had to enlarge the holes a little to make it fit the Stihl. The choke linkage is a bit complicated, but works nice and exits the cowl through the cooling hole at the bottom. The ignition is located inside the radial mount, and cannot be moved to other engines like the CH.
Here is a picture of one of my other 038's, but this one I did the conversion myself. It uses the CH Ignition. I have many engines, but only three CH Ignitions that I move from one engine to another. The conversion cost me about $200.00 not counting what I paid for the 038 chainsaw. I was lucky enough to find a couple that had been dropped and broken. Used 038 chainsaws usually do not go cheap, but when I find one I buy it.