There are a number of MII kits available for your truck, some even bolt in. I would contact someone like Speedway and talk with one of their Techs, I'm sure you are not the first to about about leave a 6 cylinder in engine in the truck. Regardless of the kit you decide on there will always be some unknowns. MII IFS usually require use of a rack and pinion which means modifying the steering column, that is just one of many things to consider.
I am in no way trying to dissuade you from using a kit, it will improve the way your truck rides deffintly. Take a look at your options before you cut anything, there is always another way of doing something.