I have a cub 3204 with a CH20 blown engine and I found a parts gt2550 with a CH670 engine. I'm fairly sure it's a direct easy swap. Maybe exhaust needs changed, but everything else bolts up, plugs in. Am I correct? It will be the first full engine swap I do on anything this big, so don't really want to mod anything crazy. They both go to the same service manual. I just want to confirm I'm not missing something out of inexperience
https://resources.rehlko.com/engines..._690_06_EN.pdf