Demon 340 vs Camaro 396 (400)

This might not be comparable. My dad & uncle ordered new barracudas in 69. My dad got his with a 340 4spd & my uncle with a 383 4spd. If i remember right both had 3:55 gears I remember my dad saying how he would beat my uncle in the 1/4 mile every time. Dont quote me on this but im thinking it did high 13s