1974 360 horsepower rating
I had to read this post because I had a factory 74 360 Duster 4 speed (I wish I never sold it) that was pretty stock. No internal engine mods, stock intake & exhaust manifolds, even the factory Thermoquad carb. That car was pretty fast & with street tires on it, I got it to run 14.11 in the quarter mile at Atco, with poor traction in 1st & 2nd gear, so with good traction & a better driver (I was no professional drag racer that's for sure) I think it would run high 13s no problem. Closer to 300 hp, I would agree with that. They certainly had the potential to make that if tuned well in their stock, as delivered form, IMHO.