360 year differences

I saw a truck in PYP that had a 360 with a car pan on it. A buddy of mine had pulled the J heads off of it and mentioned the casting date was 70. Sure enough I went and looked at it and it had a casting date with 70 at the end. Don't remember the month. What about that?

I had a 75 360 out of a van that didn't have the injector ports drilled but the bumps in the exaugst ports were there.