no pivot adapter needed, and as far as height, are you planning on standing alot or just better seating position, if standing id go 6" anyway, Im 6'1 and i run a 10" but i stand a lot! if sit n ride style you could go 4" Powermadd for arctic cat
i got a 8" on my 04 and i did not have to extend anything. i just rerouted my brake line. which i didnt have to just did it to make me feel better lol but i have ALOT of throttle cable room yet could easily go taller if i wanted.