What's the deal with the Poly 318

I am not a pure purist, but I like engines in models they came in. It just seems appropriate. Maybe the 426 hemi did not come in a 59 Fury, and to me does not need to be there. But a gen 1 hemi would work for me there. Thats my point.
The poly 318 "wide block" is not really wider, yes some heavier than an LA, the poly heads look wider and thus the name.