Unfortunately, there's a lot that would need to be changed.
* The hatch assembly is different and would need to be replaced
* Therefore, the upper case assembly must be replaced to accommodate the new display port
* The audio board is incompatible and must be replaced
* The hard drive cable is different, and therefore the hard drive cable AND the hard drive must be replaced
* The audio cable is incompatible and must be replaced
* The trackpad control cable is completely different and must be replaced
* The airport/bluetooth cable is different and must be replaced
* The heat sink has the pads in different locations for the chips, so you would need a new heat sink AND a new fan (the original did not have the fan separate from the heat sink)
* The processor clamp is angled differently and must be replaced.
In other words, it really can't be done.
Sorry