News:
I believe they are 40 lb cylinders. I got them at a local RV supply store. I have them in a box now so I have to look for the part #s , so you can get the length . I attached them to my rear bars on my roll bar (but you could make some brackets to attach to the rear seat support frame. Here are some pictures on my build thread. http://www.cuda-challenger.com/cc/index.php?topic=75207.195