So was the 307 rocket too?
The "Rocket" name was dropped in during the 1970's
In 1977, the 3 motors I see are the 260, 350, and the 403. If you can tell me the block numbers, I can give you what info I have, and then we can talk performance numbers
The Block ID number is between the manifold and timing chain cover. It's probably covered by grease and dirt. Wipe it off and get me those numbers