Interesting Tom, thanks for posting.
Someone has a pair of good looking motors all painted up with new clamps and all, but no spec on the motors, which I would certainly expect to see the comments on bore, in particular. Any time a 427 is "rebuilt", the builder will know what bore it is, as this is a real talking point with these motors (because they CAN NOT be bored to excess).
Also interesting, the last sentence in your note you posted (the ad you copied) says the transmissions were rebuilt with a 2.0:1 ratio, when the tags on the motors say it should be a 2.5:1 ratio.
Did you see the note about throttle body injection?????????????????????????????????
This is cause for careful verification. Buyer proceed with caution.
Regards,
Paul