Hey, I am hoping you all can help me out. I have a 4wd Nitro, not sure if Shock or Heat. I do know that its pretty basic model. My dad went to change the plugs on it today and could not figure out how to get to them. I've been all over the Web trying to find an affordable repair manual to no avail. Is there somewhere I can get printable step by step instructions on how to swap them out? Diagrams would be a plus as well. Thank you all in advance!