Getting the cushions off the OEM basket is pretty easy. Doesn't take but 10 minutes to grind off the rivets on the back of the OEM basket.....of course that's if you have a decent grinder. I wouldn't do it with a dremel lol.
You may need to bevel about 1/4in off of one of the gears on the crankshaft depending on what model year the gear is. When you go to install it you'll see the issue if it's there