Muncie to Hurst Shifter for '66 SS396

My Muncie shifter was not shifting the way I wanted it to and after reading some posts in this forum I decided to switch to a hurst comp plus. I got the whole package so I am assuming it will have everything I need. I am planning on doing this myself. What should I expect? I have a bench seat with a M20 tranny. I think the hurst shifter will come with instrutions, but any other advice? Do I have to drop the tranny? Is most of the work done from inside the car or under? Anything on this forum that would step me through it? Pictures?

Brian