Thanks "Clocked" for the info.
As you mentioned the alternator lives on the other side on the Chevy setup.
So I am going to take a chance an buy the one I have found on eBay .
Engine is now running nearly ok , but i still have a few snags to work through .
Sort closed cooling system
Engine check light does not work
Oil leak from front timing cover area .
Replace sticking throttle cable
will keep you posted.