I'm not entirely sure that the MK1 clutches and the MK2 clutches are the same. I think they changed them to the single diaphram spring set up in 86 and used that through the production of Royal Stars as well. I agree with everyone else, I'm running the skydoc kit on my 88 and theres absolutely no slip! Just be sure it will work with yours.
If it wont, I do believe the barnett conversion will!
Good luck!