Rebellious:
Go to John Mummert's site (link from this site) and find and read the article on common mistakes made when building the Y engine, and see that your engine shop sees it. I would seriously doubt anyone working there would have much if any experience building Ys, and there are some things that can be assembled wrong. Simple things, like bolt lengths, cam timing, oiling issues, etc. Good luck with your new engine.
John in Selma, IN
John - "The Hoosier Hurricane"