As for ground effects, you will probably have to fab them up yourself, unless you have the square body style LUV which the mid 80's Isuzu should be pretty close. The Luv's were pretty much done by the time ground effects started being popular (which was pretty much an 80's thing). This was the main dam that was available for the LUV when I was building mine and it is pretty much out of style also! If you are serious, look through a JC Whitney catalog as them might still have some stuff, but they will probably be the only ones
If you are talented with metal forming, anything is possible for the front end, if you can imagine it, someone can build it! I have seen one luv that had some new kind of halogen style lights grafted into the front end.