To answer your question Gazza, suggestions of a complete engine replacement based on a failed drive belt, overheated engine and the suggestion of a failed head gasket from the original poster. You suggested the replacement was Required due to a warped alloy head.
There was no mention of make or model provided. How did you determine the engine was fitted with an alloy head?
Gazza, I have read many a good post of yours in the past such as your drowned outboard repairs and your information has been great.
As per my original post, I was pointing out the conclusions / diagnoses that where drawn with next to no information.
Moving on I've said my piece, what a top bloke to stop and help a complete stranger out.
Sounds like the old fellow was looked after as well as the repair cost sounds like genuine 1990's pricing to have the head gasket, water pump and drive belt resolved.
Good on you.