Thanks Rallyace. I've just poured over the article on rebuilding a flat head and the writer answered a lot of questions for me, mostly that some of the operations such a honing and boring and that sort of thing are more time consuming than too difficult. I think I'd buy a used engine and work on that. If I blow it at least I will learn what I did wrong. If it runs, I can always swap it out. One of the things that this article brought home to me is to remove the feeling of doing all that work and finding it runs crappy or not at all. There' a learning curve with everything and sometimes I get too impatient. Anyway, thanks to all of you, I now plan to get another engine and give a go.