yeah i had that issue too
Get someone to help you, just push/pry the engine to widen the gap and it should be a much smoother install. I didnt have to remove any bracket, just the bolts holding the dog bone on. if you have no one to help, try finding a small jack and see if you can get it to fit between the subframe and block, could be a possibility? Its just a matter of finessing the motor out of the way to get everything to line up again.
btw, its a great mod, makes shifting feel so much better