Holley Street Dominator vs '73 Cast intake

Weather differences?
I think both days temp and humidity were good. I did have a "slight" head wind with the SD, but it seemed most racers were running the same MPH. No way to ever get it perfect, not even on the same day as time changes the condition. I think the days were very comparable.
I knew they would be very close, and they were. I just figured if any difference in the quickness, it would favor the cast (especially with the SD having the 1 inch open spacer), and any difference in mph might favor the SD. Funny how it went opposite.....