When an engine is overheated a lot of other parts can be damaged. If it has been severely overheated at high speed, then the engine may not be worth repairing. There can be hidden collateral damage that could come back later to bite you.
Problem & Solution
Common among these chassis:
Watch Kent's youtube video in which he will explain what potential problems you may run into. One of them is making sure the cylinder head has not been badly warped. He will also show you an example of an engine that only needed a head gasket.
To inspect your engine after removing the head you will need an accurate machinist straight edge to help you determine the condition of the head and cylinder block. See related products for the straight edge Kent recommends.