What would you set them and how many overs, would you leave, to let hem have a crack at it?
Personally, I think it will depend on how well the first hour goes, if KP's got himself in or another attacking batsmen, I reckon, they will go for it and get as many as they can but leave enough overs to enable the England bowlers to have a crack at them.
The last thing SL will want, is to face 50 overs and to lose 3 quick wickets, it will make them very edgy and nervous.
I doubt if they will, or need to but if they set them 330 with 50 overs left, it sure would be interesting, to see if the SL's, wanted to chase it down.