First thing, check your compression with a guage...your cylinders should be within a few psi of each other. Second you can pull your exhaust pipes off and look through the exhaust ports as you rotate the engine over to see how badly you scuffed up the piston skirts. They will usually scuff far worse on the exhaust side as this is where most of your heat is directed (light scuffing is normal, huge gouges or chunks missing not good). If it compression tests ok, doesn't have any knocking, and the skirts look descent then you are probably ok. Then you should also pull you water pump cover and check that the impellor isn't melted, you need to figure out why it over heated. Coolant level, water pump impellor, jetting and head gasket leaks are common reasons for overheating issues.