http://www.rockhard4x4parts.com/cj7-79.html

Above is a link for a bolt in roll cage. Does anyone have any expereince with these. I like the way they bolt up to the dash and floor, they offer easy install, leg room and replacable components.
But has anyone used these or seen these in action. In otherwords seen them installed on a vehicle during a roll over or after and how did they hold up?
It's my head and other body parts that are important to me, though seldom used.

78 CJ7, 83 wide track axles/Dana 30 Front W/ OX Locker, Model 20 rear w/ one piece shafts(welded tubes)/Detroit Locker, 4.10 gears. 4.5" spring lift with 3/4" shackle lift. 35x12.50 BFG MT, 4.2L, Weber Carb, K&N, T18,Scout Dana 300,Warn 9.5ti