You know, I'm probably showing my age here... but there were three different versions of the J-model. If you look at the horizontal stabilizer, you see that it has little teardrop endplates, indicative of the synch-elevator on the G-series. This makes the black/white ship a "straight" 47J with the Lycoming 435 engine. Doggy...really doggy. Later versions (J-2 and J-2A) came with the more muscular 540.