1973 360 block thickness?

There has to be a difference. Things got cheap in lots of ways during the mid to late 70's. Look how cheap GM bumpers were made in the late 70's vs the early 70's...Mopar hung on better but still cut costs..just not as much.

I'm sure any year 360 block can be just find but if you have a pick, go for the pre 75 stuff, the older the better.