Hot Rod dyno tested a 383 a year earlier (October 1967). It was a 67 version, supposed to have 325 hp. Actually made 280 - exactly the same real hp as a 68 340 rated at 275 hp. Also, coincidentally, exactly what a 67 383 was rated when it was put into an A body.
The 340 was one of the very few engines they dyno tested that actually made its rated horsepower (actually five more).
One of the worst was a 1958 Ford 352 - first year for the FE motor, supposed to have 300 hp. Actually made 200.
