We run a bolt in autopower bar in both of our focus, with both run on the track.
The gold car had no back seat or pretty much other interior at that time. We have since started turning the car back into a street car.
Our other focus a silver one runs the same roll bar, but retains the full interior.
To get the cage in and the interior is quite a pain in the rear. First you have to remove the rear door panels and b-pillar trim, rear seats and peel back the carpet.
Now you can actually install the bar into the car
and drill the holes
After doing this a few times, in other cars too, I suggest you sit the bar in the car and get it lined up first.
Once lined up drill one hole in one leg of the main hoop, install a bolt and just snug it up.
Now drill 1 hole in the other main leg and pop in a bolt and snug it
Drill 1 hole in 1 rear leg and snug
then the last leg and snug.
Now nothing will move on you and you can drill the rest of the holes and torque all the bolts down properly.
Now we can put the door panels back in, but first you have to cut a relief in them so they will fit around the rear legs. It's a real pain in the rear to wiggle them into place. You can then pop on the B pillar trim.
The rear seats are fun. You have to put the back part in first and bolt it down. The seat back has to be upright because it wont fold down with the cage in the way. After fighting with that for a good hour or so, you can carefully cut your carpet so it will lay back down. I put a slit from the edge and then cut around the bar. Now lay the carpet and put the back seat bottom back in.
Plan a whole weekend to get the job done.