Nitrous and head cfm

Long story, short version...Long time ago I ran a 318 in Colorado with ported J heads and a 150 shot, it ran 13.9 at Bandimere (~9500' DA). Same engine about a week later with ported 302 heads the car ran a best of 14.5 on a 150 shot (also ~ 9500' DA). So yes, head flow does matter.