There is no difference between the SyTy and the LB4 upper shroud. (There is a difference for the L35 upper shroud, but it can be modified for the SyTy.) The lower half for SyTy is the same for all 4 wheel drive, 4.3 1st gen. The 2WD lower won't work at all on a 4WD.
If Phil questions it, I...