Need help I.D.ing this engine

A56 said
Should be a casting number with cubic inches similar to this and it appears that you have the last 6 of the vin 134413
View attachment 1716385252

That's what I thought, like a small or big block Chrysler, but I did not see anything. I'll look again tomorrow to be sure & take more pics. Could slant sixes be different? IDK. Thanks for the help on this.