I have heard people here suggest putting a number of shims behind the top bolt of the hinges. My 56 did this for years. I was at a cruise one night and a guy saw me pushing down on my hood and told me to go home and spray the heck out of all the pivot points with WD40. I had already lubed the hinges with a spray form of white lithium grease and thought he was nuts. BUT..I went home that night and did as he suggested and it's been 3 or 4 years since I've had to push down on the rear corners of the hood. Now..some guys here have said they did this and now their hoods wont stay up all the way...It wants to close on it's own. I haven't experienced this. But even if I had I would have sprayed a little brake clean to remove the WD40.