When the time comes to rebuild the 2.0 in my 87 Ranger, how difficult is it to swap the carb for a fuel injection setup? Is it just swapping the intake and fuel delivery system, computer and fuel pump? What other additional electrical stuff will I need? Can I use the same head? This will be down the road a good ways, but if it's not a huge PITA I would like to start gathering the stuff I need.