Ive got a Sierra Sapphire S/D 6 point bolt in cage with diagonal in my three door Cos(ATM), with a full interior, (carpet/rooflining/rear seats and door cards and seat belts).
Saff cages fit ok in 3 doors apart from the middle uprights arent behind the B posts, there about 3" in towards the front.
My cage will be coming out soon and up for sale as i want a weld in cage and less interior.