The -7 is NOT a core shift number, it is a number telling how many repairs have been made to the core.
Think about it, core shift happens during the pour. Any numbers cast onto the block have to be in the mold before the pour.

The easiest way to tell the 440 cast crank is to look on the first crank counterweight. There will be the number "440" cast onto the edge of the counterweight. Also the counterweights are very square.
A forged crank could be either a 383/400 or a 440, it will have counterweights that have a more rounded shapes. to me they look like lima beans. A crank with lima-bean-shaped counterweights and 2.71 - 2.75" main diameters is a 413 or 440 forged crank. Most 413 cranks have a couple of tangs at the rod throws, they stick out and I think they were intended to throw oil around. Notice that they disappeared at some point when the engineers decided they weren't necessary. Also there are early 413 forged cranks with 8-bolt flat flywheel flanges, these aren't useful without modifiction.


Or check the pictures at www.440Source.com
R.