There's a pic of my big bore when I got it. I'm fairly certain there weren't sleeves. Can't see them in the pic. Believe it or not I can't say for 100% because there are just too many other things in my head that are competing with memory space, lol.
How much can it be bored? I really don't know. I do know that it's not something you want to do unless you really have to.
IIRC final bore on my motor was 3.7005". I know that I speced the bore at .003" over piston size at the skirt. The pistons are uncoated 2618 alloy, a smaller ptb would of been used with skirt coated pistons.