Hi Nichols and welcome to the insanity. I can't swear to the 78 but on my 82 and many others the panel that the flip up part of the engine cover hinge is attached to comes off by removing about 10 or 12 1/4" bolts. Once removed the entire top of the engine is exposed. Good luck.
"Socialist governments traditionally do make a financial mess. They always run out of other people's money. It's quite a characteristic of them."
~ Margaret Thatcher ~