This block looks similar and has casting number 0 395946. Does anyone know if the 0- casting numbers were assigned in numerical order? I’m curious if I could narrow down the time this was made based on the casting dates of other experimental parts in relation to the number after the 0-. For example, was this block with the 0 395946 designed after mine with the number 0 359198?
https://hotrodenginetech.com/1969-z28-canted-valve-302/
Jason