67 twin turbo dart

NGK 7 copper would probably be fine, go to an 8 if you ever get past 4K rpm. Make sure the gap is tight. Like .018 tight. Turn the dwell table on and populate it. 3.5 w/1ms seems like an issue but I’m not sure how MS applies those figures. I started with speed density fueling but changed to VE. I think I sent you my VE table. That ended up within 2% correction on mine. What’s the AFR table look like?