i believe youre thinking of the articles in GMHTP...from 5/02, 7/02, and 9/02. "Buick Power 101" parts 1, 2, an 3. If those are it, I could scan them tomorrow night for ya.
One other source you may be thinking of is the Buick Grand National Racing Assoc. had a 3 part series in their newsletter with Lou Czarnota back in 2001 or so.
Anybody here have one of these Merkel engines? How do they hold up? I keep worrying about doing my own rebuild an dlosing a cam. The articles never mentioned the famous #3 Exhaust problem