fuel seeping from my valve cover

[stealthe]

A long story short..I have a 89 240 sohc..I went away this past winter for three months while the car sat untouched. When I returned home I knew the battery would be dead but when I jumped it the engine shook really bad and fuel was seeping from the valve cover. You could see it coming out in small spurts. I Checked the oil dipstick and it smelled like fuel. I was stumped and thought that it might have been the injectors or the pressure regulator so I replaced them,the oil,the oil filter,the fuel filter and I still have the problem. I gave her a complete tune up prior to leaving and she ran like a champ. she has about 260,000 miles on it and the previous original owner babied her. I never drove it much(milage wise) and never drov eit hard. All this from just sitting for a few months....could it be the valve seals?...bad cylinder?...I'm stumped