The sway bar part will be easy since your A Arms already have the mounts and the holes should already be in the frame.. so get one from a donor truck and mount it up...
As to the motor.. Yes you will need one from a 1988-1992 for it to work properly. But everything will still be the same. one thing that you will need that i did forget is the Radiator shroud is smaller on the V-8 models so score one of those as well.