that craftsman is a McCulloch 32, I haven't seen any of them like that, they're usually the Poulan thats like the Ryobi being rear carb and exhaust

if you're interested I have a prop hub made up for the mac for using the flywheel, I swapped it over to gas/glow and just made a one piece hub for that purpose... I also have the trimmed mag mount plate if you're interested...

I believe that Stihl is a 25cc, there's been a couple of them on here lately, I have one, I never did get the Mikuni carb on that thing to work even after a rebuild... but I just put it together the way it came apart which could have been my problem...