Oil in anti-freeze

I have a 94 z28 lt1. I got a hole in my radiator hose and the car overheated. Now it starts fine but when it gets warm it accelerates funny kinda like its not getting gas. I checked the oil and it looked like there was coolant in it. There were little bubbles on the dip stick. Do you know what is wrong with it? Is there a way to know if its the block, head, or head gasket without taking it apart