Lee....gap is set for .025--.028 inch. The firing order for you plugs should be: 1-5-4-8-6-3-7-2
Since you are at it...go to Kanter's (See links on my site) and order some original spark wire sets. I ordered the striped yellow/ black..cotton with coating on top. They look real cool. Haven't posted that picture to my web site yet...its coming.