Hi guys,
Here is a link to a great article on modifying your distributor to keep up with your modified engine (think setting your advance curve and soforth rather than just improving spark)
Its all straight forward DIY and makes alot of sense, not at all blackmagic. I will be following it through on my old banger
http://www.google.com.mx/url?q=http://www.firstfives.org/faq/timing/timing_for_modified_engines.PDF&sa=U&ei=7oxNVNPdNquN8QG8v4DIBA&ved=0CAsQFjAA&usg=AFQjCNEasFUdqVc-E6vQy15gmO-7FjjGKA