You are taking your chances.
The only thing that supports Ivy Bridge 100% of the time out of the box is a 77 motherboard, like Z77.
Other things need to have the newest BIOS in order to be able to run it and you don't know how new the BIOS is before you buy it.
The safest option is to go with a P8Z77 instead, but if you must get the P8P67 I would have a contingency plan for where to borrow an 1155 processor to update the BIOS with before you put the Ivy Bridge chip in it.
People buying Bulldozer chips get burned by this same problem every day. It sucks, trust me.
I would just go for the Z77, it will have UEFI and other great stuff and isn't super much more expensive than the P8P67.
Also, you may want to do your shopping at Micro Center. If you buy a 3570k Ivy Bridge chip they will give you like $50-$90 off of a motherboard to go along with it. Even if you don't get that deal, they usually do better than online stores.
You would have to have one close, though, which not everyone does. I had to drive an hour each way to get to the one I go to.