Why would you think that it was not a real 302 being 30 over??? Who would really care about that? I get nervous when people talk sleeves for no reason IMO but that is just me. If you look at it by not being original because it would be bored.....its not original anyhow because of the sleeved motor. Hopefully a sleeve is not moving around in the bore. Try the umbrella seals. They don't need to have the head cut. But they do move up and down with the valve because they are not fixed to the head. Should be better than nothing though. Good luck!
