Hey! So I just recently purchased a '78 280z. It, for the most part is in amazing condition, but it has a handful of noises/problems that I want to try to fix. If anyone can help with the following, that would be awesome! A metal 'shrill'/metal vibrating noise when car is parked or while accelerating. Wasn't as bad before, but has gotten progressively louder. Oil pressure gauge dips to near 0 when parked or at a stop, but moves back to the middle of the gauage when driving. Heat comes out of defroster vents, but not from the regualr vents on the dash. Water leaks into passenger side when it rains. Seems to be coming from the top left side of the passenger feet area. (Behind the glovebox-ish) There is a thumping noise when I hit bumps coming from the rear of the vehicle. The car also rocks side to side when I hit a bump at high speeds. I think these two are connected. I know it's an extensive list, but any help would be great! Thanks!