Check out this thread from last year. One thing I might add is that unless you are going to use the conversion on a regular basis you are better off just renting a cart when company comes. Also, because you have to put heavier duty shocks in the rear for support the cart will ride very rough with just 2 people in it. Finally, if you are avid golfers, you may not like it as the golf bags ride higher and it is a pain to get the clubs out of the bag.
Help..Converting 2 passenger golf cart to 4 passenger.