How do you get the tank out of the car? I have an srt-6 and have taken off the two nuts that hold the tank to the mounting studs. That allows me to shake, pull and pry on the tank but it will not come loose/out. Iit seems too set on a pedestal (that is part of the tan)k and that pedestal seems to go thru a rubber grommet and then thru a hole in a metal painted bracket welded to the car. I was afraid to shake or pry harder because I did not want to break the tank. How do you get the tank out? Thanks