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					Originally Posted by patrickt  ... and if your bellhousing and blockplate hang down below your frame rails, you should trim them off so they are flat and even.  Yes, that voids the sfi rating, but if you're ever driving along and your bellhousing kisses one of those steel plates they put over holes in the city, you're going to have a really, really bad day....  | 
	
 The lowest point on mine is the bellhousing - which has already been hacked off flat as much as possible. There's not much below the ring gear.
The old 
oil pan was much lower, but when I had the new one built I had it set up so the bottom is parallel to and just slightly above the bottom of the frame rails. The pan has kick-outs on both sides and the sump is about 80% of the length, so there's no issue with capacity in spite of the reduced depth.
The thing I worry about most is parking lot speed bumps - I avoid them whenever possible. If I have to I'll either straddle the gap they often put between them, or take them on an angle as others have described.