The bigger cam AND 10.25 compression FROM 8.5 and "only" 5 more HP. Yeah. I think that's some of that insurance fudging. The 383HP was a runner. Some of these cats around here don't wanna admit it, because it might take some of the glory from their beloved 340s and 440s.
And the EH1 360 in the LRE... a nose-heavy pig that had the aerodynamics of a brick schoolhouse was the quickest 1/4 mile time of American made cars (including the Z28, Corvette, and mustang) in 1978. 14 second truck from the showroom!