I recently pulled a duraspark system out of a 78 lincoln that has 3 main leads coming out of it. The odd one with two wiresis connected to some sort of vacume switch. Can anyone explain what this one does? I am thinking it has someting to do with advancing the system butthe lincolnalso had a vacume on the dist.

 

heres the digram i use http://www.mustangsteve.com/conversion.html

 

Thank you,
I have that diagram too but I ended up with somethng a little different. I will try to get some photos up soon

 

yeah there is more than one setup different box etc might just want to swap to the 85 mustang style setup if you keep having problems