[mwilliams]

Been fighting rough start with popping air box. Moved timing from 10 to 13 and it runs like a champ - at least for now. Any thoughts/ experience on the matter ?
Having trouble maintaining idle setting - is there a second idle control screw below the usual one ?

 

[yo2001]

No, I don't think that there is second idle screw. I have 78 and after I install the header, it started to idle rough. In my experience, I can rich the fuel about 35% and fix the idle. Down side to this is my fuel mileage went from 17MPG to 12 MPG