I agree with you 100% but it's not something to get upset about is all :) It's not like he's straight up lying to people about what it is.
BTW.. i was curious.. is it possible to go bigger than 4" in a 318 block? 4" seems to be the magic number everyone goes with
Are,you asking about bore, or stroke? More stroke is possible. A 4" bore in a 318 is shaky. More than a 4" bore is extremely risky (NOT a good idea). If i had a 318, id probably build a 392 out of it.
Edit: poly 318 blocks can probably be bored bigger than an LA 318.