In the old dayz it was .060 w/msd but that seems excessive so .035 seems to work real well n/a at least and NGK`s for me......

Last edited by Thumperdart; 11/11/15 01:47 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....