yeah... actually I just thought about this. Why would you have to buy a core from me when you already have a core. Go to pick and pull with your tools, pull the head and then exchange your messed up head.

The only downside to doing any of that is you may pull a head from a car and it could be a warped head. That's why looking for an actual wrecked car is better, it limits the possibilities of it being a motor issue.