I was a toddler when this came out and prone to music. (When I graduated from Kindergarten, my teacher actually wrote on my final report card: "Lambiepie loves music, I would not be surprised if Lambiepie became a musician.")
I'm only sharing this because this cartoon of King Kong wasn't that spectacular, but the theme song...now they worked on that! It was memorable, it was catchy, it was "da-bomb". And yes, I remember it too!!
The early to mid sixties were a wonderful time for cartoon programming. There was a lot of experimentation, such as with King Kong. But the them songs were more than just a tune -- they got you involved in the cartoon, interested -- and the best stayed with you. King Kong's theme song was like the theme to "Jonny Quest" - you knew something was "cool" about to happen. But unlike "Jonny Quest", King Kong did not deliver. Maybe it was the "little boy" with King Kong when we all kinda figured out the beauty and the beast thing...maybe they dumbed it down to our generation when we wanted caliber toons like Jonny Quest and Astro Boy, GIGANTOR and shows like Ultra Man, etc. Tom T.H.U.M.B. wasn't that memorable either. I remember "Inch High Private Eye" and "Atom Ant" though...
But I'll side with all my fellow posters here. It's the memorable theme song that would make you remember King Kong at all. This is a classic cartoon theme song along with "GIGANTOR", "Kimba the White Lion", "Spiderman". Lush production, serious musicianship. And the cartoon? Nah - nothing to write home about.
Peter Jackson's homage to King Kong is due out any day and I've gotta say... this song should be included. It would kick butt. :)