Re: Distributors and advance curves - how many did Packard build?

Posted by PackardV8 On 2010/6/16 23:22:55

Try this one:sparkplug-crossreference.com/index.php

BUT there is problem! A COMMON problem with using conversion charts for plugs over the years. Use the 45XLS to convert to NGK or AL. THEn use the NGK or AL number to convert back to AC. They DON'T convert back and forth consistantly.

So the only option is to take the AL 56 or 66 number AND deciper it's meaning. OR use the AC number. THen use that criteria to build the new more secular number. Mite not work. I don't know.