I have been watching this thread to see what you guys came up with so I went out to the garage to look at my 66 273 motor and see what kind of numbers mine had on it. My block casting numbers are 2465330-3 my pad numbers just under the drivers side head are B-273 9-10 and I pulled off the drivers side valve cover for the head casting numbers and it reads 2465315-3 I did not pull off the passengers side cover. Also on that drivers side head next to the casting numbers are some other numbers, they read 06025 can any one shed some light on what these numbers mean. If someone can tell me what all the numbers mean that would be great. This is a 66 273 2 bbl motor not a commando motor.
Thanks
Bob