I had a similar grind in a big chevy way back when. Stock stroke 427. It was the old SS grind, later changed to CC grind. Now, I don't know what it is. .600/620 310/320 advertised on a 106. That was such a nasty soundin big block nobody ever even looked at me at a red light. LOL Had it in a 69 Chevelle with a "Munchie 4 speed" as a good friend calls them and 4.56 gears. That car was not slow.