I think this would be a kick ass fight. However seeing Tito a few times 185lbs might be too much weight for him to cut. This is a big strong dude. And 15 lbs is ALOT of extra weight to loose from a weight in which he was already very lean.
I think Tito would be the ideal fighter to throw against Sliva. Sliva would not be able to man-handle Tito in a clinch the guys just way to big and strong.