Dyno a 7.5:1 400? Sure, why not?

The 400 is the most under rated engine in the whole Mopar universe. The quickest and fastest dead stock Mopar I ever owned..and this includes Hemi and Six Packs, was a 72 Roadrunner 400 4 speed. Car had a 3:55 gear, no options and with ONLY a basic supertune ran effortless 12.80's on street tires.
True, I never came close to duplicating those numbers with another similar stock 400, but that one happy freak made me a believer.