My MT isn't nearly that squirmy, it just handles a little worse than my buggy, but that's to be expected. At least your Granite likes to land on the wheels!
Yep, buggies corner well, sometimes too well! I haven't flipped my buggy when turning at 1/2 throttle yet, but my new 1/16 scale MT is teaching me to be more careful in the corners (it feels a bit less "planted" in corners, likes to slide and spin out).
Yes, I was thinking about those rigs too! Right on, just follow what Wicked said! Also, make sure that the shock mounting hardware (top and bottom) are the same, otherwise you might run into some hardware issues.
First, welcome to the forum! Ask any and all RC questions here, and feel free to post RC stuff! I haven't heard of that rig before, so I'd say get 2 rebuild kits, and a bottle of suitble weight of shock oil, (so you can rebuild each shock once). Rebuild (or at least change the O-rings and shock...