Maybe first put the valve cover back on, and I would use the old valve cover gasket, and wait on the valves and clean the oil up first. I see lots of kitty litter in your future. Try using Simple Green to clean the driveway. Dowse the engine in a healthy amount of a engine cleaner, and visit your local do-it-yourself car wash, and carefully wash the engine. Or use a power washer. You want the engine as cool as possible, and don't use high pressure. Then re-attempt the vavle adjustment.

I would tighten the p/s belt and see if that turns the belt. I use the p/s pulley to rotate the engine when I adjust the valves.

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