Since Toyota's current specs on the website leave a lot to be desired, I crawled around and got some ground clearance measurements in a few locations.
Stock LC 1958 edition with stock Yokohama Geolander X-CV GO57 245/70R18 110H.
Front center of metal skid plate (not lowest point) - 8 5/8"
Composite skid cover engine bay lowest point on driver side - 7 13/16"
Crossmember exposed in composite skid - 9 1/4"
Lowest point on rear diff - 8 7/8"
Stock LC 1958 edition with stock Yokohama Geolander X-CV GO57 245/70R18 110H.
Front center of metal skid plate (not lowest point) - 8 5/8"
Composite skid cover engine bay lowest point on driver side - 7 13/16"
Crossmember exposed in composite skid - 9 1/4"
Lowest point on rear diff - 8 7/8"