HU blind battle PF question

[vmacosta]

This came up in another thread and I think it's interesting enough to have its own thread. Plus some good posters disagreed with me so I want to see if this is consensus.

Say you are in the BB and its folded around to the SB who opens (assume for now 6max game so BB=button, but I'm thinking this is probably going to reduce down to a basic HU pf question that specialists and computer/math geeks already have a good handle on).

Assuming for now that SB opens with 60% of his hands, with what range do you 3-bet?