I have an 88 LX that I tore down Saturday and I cant think of anything that would allow it to move but not lift. The upper to lower gasket usually doesnt hold the two together unless someone put RTV or somkething in there. Try looking in the front and rear of the intake on the drivers side and make sure you got all the hoses that connect underneath. Theyre rubber so they could allow it to move a little but not lift. Theres one that runs from the passenger side of the engine that hung me up at first. Too bad my cars out of commission or Id come take a look at it too. I tore off my upper, lower and both heads to clean and regasket. It started out as just a mission to replace the valve cover gaskets and lower intake gasket, next thing I knew the heads were off. Decided if I was already that far, might as well go all the way down to the cylinders. But man... do I hate walking....