I already installed the recommended shift kit in preparation for this turbo, Not a hard install, but definitely be prepared for a much firmer shift, not 100% sure I like it yet, but if it saves my transmission from major failure down the line i'd say it's a mod that needs to be done and worth it for the turbo!
If you adjust the kickdown cable after the shift kit is installed will that smooth it out a little until the turbo is installed? Might be worth a try. If it feels slow to shift after the turbo you can adjust it back. I am just asking - I don't have any clue if this is a good or bad idea. Hopefully someone with more knowledge of this area will chime in.