I am plotting out my roll bar setup for my car and would like to see if anyone has a picture of the location of the main hoop is. Could someone measure it from the front area and let me know so I have a good starting reference point? I am planning for now,using the stock buckets in the car. The second thing is how did anyone mount the rear bars to the frame? I am getting a set of back bars that go through the speaker hole and need to weld them to the frame. How is this done. I am also using a stock gas tank. I looked at the NHRA rules and it states the bar has to be welded to the frame in a car with a full frame. Any ideas or help??