Without looking, I can't recall if the control plate was the same. The swash plate arm is.... but I think the control arm is different. I think the parts book calls it a swashplate. (Not really what it is, but I think that is what it is called.) Go to cubcadet.com and look up the two machines and compare. You can do it just like I can. Or park them side by side and compare. Sorry for the above confusion. The rear ends themselves will interchange, yes. But some of the control plates may not.
The CV shaft conversion is a good one to do. I'm sure you are like a lot of SGT owners though. Probably just going to use it as an overgrown lawn mower, so other than adding some rear end braces, and getting it working good, not a lot you need to worry about as far as making it "stronger". Probably would have been a lot easier if you had bought two "like" tractors, and bought a CV shaft by itself if you wanted to do that conversion. Also a lot easier for you, and us, if you would "dig in" and find our exactly what you have, and what you need to fix. Guessing usually just makes things worse.
