There's no way really that Perk can guard Odom, I really don't see it. If they move Perk away from Gasol for KG to guard Gasol, I think we'd be best served by going small with either having Powe or Baby on him (though I don't like these two on Odom either, but they can be mismatch on the other end) or alternatively bring Posey on to guard him. And as the poster above said, I'd be comfortable with Pierce giving it a shot, and have Powe, Davis, or Posey on the SF... I'm not that worried about their SF situation.
Perk might be able to do a fairly good job on Odom if he's simply facing up to him, but the problem will come from off the ball movement more than anything.