The engine code is good - the V is under the 4.
I think the VIN is probably OK (hard to tell for sure with that angle), but it's missing the leading 1. That's more problematic.
What's the chances they found an non-VIN stamped block and picked a VIN that matched a 68 Z?
Personally, I'd want to see the other block's stamps. That would tell alot.
But given that they aren't calling you back, just run it.