LA sleeve!

thats what ken oconnor runs in his bike.
 
What's installed is the LA Sleeve "oversize" sleeve for completely replacing the stock sleeve. It comes from LA sleeve as a ~65mm hole but can be bored out all the way to 73mm (the 3rd overbore for a BBK). This isn't an inexpensive venture however (none of the good things in life are cheap, are they?!)