I was looking athhte match-up and the Iraqi/Saudi Arabis thing looks pretty even. In fall of '89, both sides have 55/60 Experience Moral ratings.
The kit is pretty well matched, with the Iraqi's having Soviet stuff, while the Saudi's have NATO. Here is a map that might work, with a little imagination.
The KSA is desert in the center, but there are a lot of hills and a few mountains along the border with Iraq.
Iran_map.zip (Size: 112.41 KB / Downloads: 1)
Small to medium battle, say 8 to 12K points. That should get a short brigade. Random Air. The Saudi's have 40 vis, so we would need to have the visiibilty range >40. 80+ would give us some lovely dust trails, if you are into that sort of thing.