300hp to the wheels 318

Something isn't right...you took a 340 and it made 279 at the rear wheels...the 2 early ones i've seen dynode only made 276 and 281 at the crankshaft just as they are rated (275)
Well it isn’t a factory assembled, stock setup... there was some effort put into both the 340 and the 318, more in the 318 and that’s why it shines.