I believe you will need a longer drive shaft, plus it would be a good idea to change the ball and trunnion to the upgraded version . The old style ball and trunnion will not last very long if you intend to have a little fun
Also k frames are different you need to find conversion motor mounts Schumacher sells them but he is having production problems. Not to mention wiring harness will be different you will need to drill holes for the z bar bracket that is also different , brewers performance will have most parts for the 4 speed conversation.
I can 100% tell you its going to be alot of work
