I would consider it a two person job but maybe others will have a workaround. I will say I've heard people suggest drilling a small (1/16"-1/8") hole through the bracket and into the channel in the hood on both sides, to allow you to get it back in the right location. I'm not familiar with the '68s. I'm assuming the hinges bolt to a hollow rib of sorts and not directly to the outer surface. Not recommending you drill through the outer hood surface of course!
Pat
Pat