i think they have the sleeves, i have never really worked on a motor and taking the valve covers off is the farthest i've ever been in a motor. knowing me, the chances are pretty good that the gasket is off. it has to be because oil was coming out at a pretty good rate, not gushing or anything, but a steady trickle. what do you use to tack the gasket to the head? where can i get some? because of the mess i am in now, it might be a good idea to get some of that stuff