casting #`s

MoparChic71 said
Moparkid in that bottom chart it says something about an "AAWJ" suffix. my 69 225 block has those letters but what is that part of the chart talking about? Just wondering if maybe you know cuz I don't but i'm interested.

look to mean a cast crank motor from 76 and newer... but I think that number would be on the crank not the block