Roll bar question

I have a 71 duster with a 360. I am about ready to finish the car up and I have heard that there are certain things that I have to do to run the car at the track. One of them was a roll bar or cage. Anybody have any suggestions on which cages or bars work the best. Also what other modifications will I have to make to the car. The engine was built to deliver 500hp to the flywheel. I have a 3500 stall converter that was matched to the car and the cam. The trans is a 727 with a cheatah manual valve body and the rear is a 8 and 3/4 with 4:10 gears in it. I have lightened the car a little, but it remains pretty much in street trim. I have the edelbrock aluminum heads so there is a little more weight of of the nose. Anybody have any suggestions on things that will make the car hook better, that would be great as well! Thanks again!

Dan