i cant find my nhra rule book and have a question regarding the shut off switch so if someone could help that would be great. my question is does th switch have to be in the rear ? or can it be on the side. i have a 73 chally, which i just installed a fuel cell and was going to put the shut off switch under the stock gas cap. is that possible ? thanks guys also if anybody has done something to that affect pics would be great for some ideas and reference