spark plug gap for msd
This is direct from the MSD hotline tech.
We recommend using a good quality copper plug, stay away from the hype plugs. Use a plug 1-2 steps colder than factory recommendation. Start the gap at .035 and increase at .005 increments until yousee a nice tan/caramel color on the electrode and porcelain.
Here is a site with good information on plug selection. We are not recommending that you use this brand, the site just has excellent information.
http://www.autolite.com/carcare/techSpecs.php
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MSD Tech Line: 915-855-7123